https://developers.google.com/protocol-buffers/protobuf-java/: Core Protocol Buffers library. Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. 
// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: google/protobuf/duration.proto

package com.google.protobuf;


A Duration represents a signed, fixed-length span of time represented
as a count of seconds and fractions of seconds at nanosecond
resolution. It is independent of any calendar and concepts like "day"
or "month". It is related to Timestamp in that the difference between
two Timestamp values is a Duration and it can be added or subtracted
from a Timestamp. Range is approximately +-10,000 years.
# Examples
Example 1: Compute Duration from two Timestamps in pseudo code.
    Timestamp start = ...;
    Timestamp end = ...;
    Duration duration = ...;
    duration.seconds = end.seconds - start.seconds;
    duration.nanos = end.nanos - start.nanos;
    if (duration.seconds < 0 && duration.nanos > 0) {
      duration.seconds += 1;
      duration.nanos -= 1000000000;
    } else if (duration.seconds > 0 && duration.nanos < 0) {
      duration.seconds -= 1;
      duration.nanos += 1000000000;
    }
Example 2: Compute Timestamp from Timestamp + Duration in pseudo code.
    Timestamp start = ...;
    Duration duration = ...;
    Timestamp end = ...;
    end.seconds = start.seconds + duration.seconds;
    end.nanos = start.nanos + duration.nanos;
    if (end.nanos < 0) {
      end.seconds -= 1;
      end.nanos += 1000000000;
    } else if (end.nanos >= 1000000000) {
      end.seconds += 1;
      end.nanos -= 1000000000;
    }
Example 3: Compute Duration from datetime.timedelta in Python.
    td = datetime.timedelta(days=3, minutes=10)
    duration = Duration()
    duration.FromTimedelta(td)
# JSON Mapping
In JSON format, the Duration type is encoded as a string rather than an
object, where the string ends in the suffix "s" (indicating seconds) and
is preceded by the number of seconds, with nanoseconds expressed as
fractional seconds. For example, 3 seconds with 0 nanoseconds should be
encoded in JSON format as "3s", while 3 seconds and 1 nanosecond should
be expressed in JSON format as "3.000000001s", and 3 seconds and 1
microsecond should be expressed in JSON format as "3.000001s".

 Protobuf type google.protobuf.Duration 
/**
 * <pre>
 * A Duration represents a signed, fixed-length span of time represented
 * as a count of seconds and fractions of seconds at nanosecond
 * resolution. It is independent of any calendar and concepts like "day"
 * or "month". It is related to Timestamp in that the difference between
 * two Timestamp values is a Duration and it can be added or subtracted
 * from a Timestamp. Range is approximately +-10,000 years.
 * # Examples
 * Example 1: Compute Duration from two Timestamps in pseudo code.
 *     Timestamp start = ...;
 *     Timestamp end = ...;
 *     Duration duration = ...;
 *     duration.seconds = end.seconds - start.seconds;
 *     duration.nanos = end.nanos - start.nanos;
 *     if (duration.seconds &lt; 0 &amp;&amp; duration.nanos &gt; 0) {
 *       duration.seconds += 1;
 *       duration.nanos -= 1000000000;
 *     } else if (duration.seconds &gt; 0 &amp;&amp; duration.nanos &lt; 0) {
 *       duration.seconds -= 1;
 *       duration.nanos += 1000000000;
 *     }
 * Example 2: Compute Timestamp from Timestamp + Duration in pseudo code.
 *     Timestamp start = ...;
 *     Duration duration = ...;
 *     Timestamp end = ...;
 *     end.seconds = start.seconds + duration.seconds;
 *     end.nanos = start.nanos + duration.nanos;
 *     if (end.nanos &lt; 0) {
 *       end.seconds -= 1;
 *       end.nanos += 1000000000;
 *     } else if (end.nanos &gt;= 1000000000) {
 *       end.seconds += 1;
 *       end.nanos -= 1000000000;
 *     }
 * Example 3: Compute Duration from datetime.timedelta in Python.
 *     td = datetime.timedelta(days=3, minutes=10)
 *     duration = Duration()
 *     duration.FromTimedelta(td)
 * # JSON Mapping
 * In JSON format, the Duration type is encoded as a string rather than an
 * object, where the string ends in the suffix "s" (indicating seconds) and
 * is preceded by the number of seconds, with nanoseconds expressed as
 * fractional seconds. For example, 3 seconds with 0 nanoseconds should be
 * encoded in JSON format as "3s", while 3 seconds and 1 nanosecond should
 * be expressed in JSON format as "3.000000001s", and 3 seconds and 1
 * microsecond should be expressed in JSON format as "3.000001s".
 * </pre>
 *
 * Protobuf type {@code google.protobuf.Duration}
 */
public  final class Duration extends
    com.google.protobuf.GeneratedMessageV3 implements
    // @@protoc_insertion_point(message_implements:google.protobuf.Duration)
    DurationOrBuilder {
private static final long serialVersionUID = 0L;
  // Use Duration.newBuilder() to construct.
  private Duration(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
    super(builder);
  }
  private Duration() {
  }

  @java.lang.Override
  @SuppressWarnings({"unused"})
  protected java.lang.Object newInstance(
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    return new Duration();
  }

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      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    this();
    if (extensionRegistry == null) {
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          case 0:
            done = true;
            break;
          case 8: {

            seconds_ = input.readInt64();
            break;
          }
          case 16: {

            nanos_ = input.readInt32();
            break;
          }
          default: {
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      makeExtensionsImmutable();
    }
  }
  public static final com.google.protobuf.Descriptors.Descriptor
      getDescriptor() {
    return com.google.protobuf.DurationProto.internal_static_google_protobuf_Duration_descriptor;
  }

  @java.lang.Override
  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
      internalGetFieldAccessorTable() {
    return com.google.protobuf.DurationProto.internal_static_google_protobuf_Duration_fieldAccessorTable
        .ensureFieldAccessorsInitialized(
            com.google.protobuf.Duration.class, com.google.protobuf.Duration.Builder.class);
  }

  public static final int SECONDS_FIELD_NUMBER = 1;
  private long seconds_;
  
Signed seconds of the span of time. Must be from -315,576,000,000
to +315,576,000,000 inclusive. Note: these bounds are computed from:
60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years


int64 seconds = 1;

Returns:The seconds.
/**
   * <pre>
   * Signed seconds of the span of time. Must be from -315,576,000,000
   * to +315,576,000,000 inclusive. Note: these bounds are computed from:
   * 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
   * </pre>
   *
   * <code>int64 seconds = 1;</code>
   * @return The seconds.
   */
  public long getSeconds() {
    return seconds_;
  }

  public static final int NANOS_FIELD_NUMBER = 2;
  private int nanos_;
  
Signed fractions of a second at nanosecond resolution of the span
of time. Durations less than one second are represented with a 0
`seconds` field and a positive or negative `nanos` field. For durations
of one second or more, a non-zero value for the `nanos` field must be
of the same sign as the `seconds` field. Must be from -999,999,999
to +999,999,999 inclusive.


int32 nanos = 2;

Returns:The nanos.
/**
   * <pre>
   * Signed fractions of a second at nanosecond resolution of the span
   * of time. Durations less than one second are represented with a 0
   * `seconds` field and a positive or negative `nanos` field. For durations
   * of one second or more, a non-zero value for the `nanos` field must be
   * of the same sign as the `seconds` field. Must be from -999,999,999
   * to +999,999,999 inclusive.
   * </pre>
   *
   * <code>int32 nanos = 2;</code>
   * @return The nanos.
   */
  public int getNanos() {
    return nanos_;
  }

  private byte memoizedIsInitialized = -1;
  @java.lang.Override
  public final boolean isInitialized() {
    byte isInitialized = memoizedIsInitialized;
    if (isInitialized == 1) return true;
    if (isInitialized == 0) return false;

    memoizedIsInitialized = 1;
    return true;
  }

  @java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output)
                      throws java.io.IOException {
    if (seconds_ != 0L) {
      output.writeInt64(1, seconds_);
    }
    if (nanos_ != 0) {
      output.writeInt32(2, nanos_);
    }
    unknownFields.writeTo(output);
  }

  @java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    if (seconds_ != 0L) {
      size += com.google.protobuf.CodedOutputStream
        .computeInt64Size(1, seconds_);
    }
    if (nanos_ != 0) {
      size += com.google.protobuf.CodedOutputStream
        .computeInt32Size(2, nanos_);
    }
    size += unknownFields.getSerializedSize();
    memoizedSize = size;
    return size;
  }

  @java.lang.Override
  public boolean equals(final java.lang.Object obj) {
    if (obj == this) {
     return true;
    }
    if (!(obj instanceof com.google.protobuf.Duration)) {
      return super.equals(obj);
    }
    com.google.protobuf.Duration other = (com.google.protobuf.Duration) obj;

    if (getSeconds()
        != other.getSeconds()) return false;
    if (getNanos()
        != other.getNanos()) return false;
    if (!unknownFields.equals(other.unknownFields)) return false;
    return true;
  }

  @java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + SECONDS_FIELD_NUMBER;
    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(
        getSeconds());
    hash = (37 * hash) + NANOS_FIELD_NUMBER;
    hash = (53 * hash) + getNanos();
    hash = (29 * hash) + unknownFields.hashCode();
    memoizedHashCode = hash;
    return hash;
  }

  public static com.google.protobuf.Duration parseFrom(
      java.nio.ByteBuffer data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }
  public static com.google.protobuf.Duration parseFrom(
      java.nio.ByteBuffer data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static com.google.protobuf.Duration parseFrom(
      com.google.protobuf.ByteString data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }
  public static com.google.protobuf.Duration parseFrom(
      com.google.protobuf.ByteString data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static com.google.protobuf.Duration parseFrom(byte[] data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }
  public static com.google.protobuf.Duration parseFrom(
      byte[] data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
  public static com.google.protobuf.Duration parseFrom(java.io.InputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input);
  }
  public static com.google.protobuf.Duration parseFrom(
      java.io.InputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input, extensionRegistry);
  }
  public static com.google.protobuf.Duration parseDelimitedFrom(java.io.InputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseDelimitedWithIOException(PARSER, input);
  }
  public static com.google.protobuf.Duration parseDelimitedFrom(
      java.io.InputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
  }
  public static com.google.protobuf.Duration parseFrom(
      com.google.protobuf.CodedInputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input);
  }
  public static com.google.protobuf.Duration parseFrom(
      com.google.protobuf.CodedInputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3
        .parseWithIOException(PARSER, input, extensionRegistry);
  }

  @java.lang.Override
  public Builder newBuilderForType() { return newBuilder(); }
  public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }
  public static Builder newBuilder(com.google.protobuf.Duration prototype) {
    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
  }
  @java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE
        ? new Builder() : new Builder().mergeFrom(this);
  }

  @java.lang.Override
  protected Builder newBuilderForType(
      com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
    Builder builder = new Builder(parent);
    return builder;
  }
  
A Duration represents a signed, fixed-length span of time represented
as a count of seconds and fractions of seconds at nanosecond
resolution. It is independent of any calendar and concepts like "day"
or "month". It is related to Timestamp in that the difference between
two Timestamp values is a Duration and it can be added or subtracted
from a Timestamp. Range is approximately +-10,000 years.
# Examples
Example 1: Compute Duration from two Timestamps in pseudo code.
    Timestamp start = ...;
    Timestamp end = ...;
    Duration duration = ...;
    duration.seconds = end.seconds - start.seconds;
    duration.nanos = end.nanos - start.nanos;
    if (duration.seconds < 0 && duration.nanos > 0) {
      duration.seconds += 1;
      duration.nanos -= 1000000000;
    } else if (duration.seconds > 0 && duration.nanos < 0) {
      duration.seconds -= 1;
      duration.nanos += 1000000000;
    }
Example 2: Compute Timestamp from Timestamp + Duration in pseudo code.
    Timestamp start = ...;
    Duration duration = ...;
    Timestamp end = ...;
    end.seconds = start.seconds + duration.seconds;
    end.nanos = start.nanos + duration.nanos;
    if (end.nanos < 0) {
      end.seconds -= 1;
      end.nanos += 1000000000;
    } else if (end.nanos >= 1000000000) {
      end.seconds += 1;
      end.nanos -= 1000000000;
    }
Example 3: Compute Duration from datetime.timedelta in Python.
    td = datetime.timedelta(days=3, minutes=10)
    duration = Duration()
    duration.FromTimedelta(td)
# JSON Mapping
In JSON format, the Duration type is encoded as a string rather than an
object, where the string ends in the suffix "s" (indicating seconds) and
is preceded by the number of seconds, with nanoseconds expressed as
fractional seconds. For example, 3 seconds with 0 nanoseconds should be
encoded in JSON format as "3s", while 3 seconds and 1 nanosecond should
be expressed in JSON format as "3.000000001s", and 3 seconds and 1
microsecond should be expressed in JSON format as "3.000001s".

 Protobuf type google.protobuf.Duration 
/**
   * <pre>
   * A Duration represents a signed, fixed-length span of time represented
   * as a count of seconds and fractions of seconds at nanosecond
   * resolution. It is independent of any calendar and concepts like "day"
   * or "month". It is related to Timestamp in that the difference between
   * two Timestamp values is a Duration and it can be added or subtracted
   * from a Timestamp. Range is approximately +-10,000 years.
   * # Examples
   * Example 1: Compute Duration from two Timestamps in pseudo code.
   *     Timestamp start = ...;
   *     Timestamp end = ...;
   *     Duration duration = ...;
   *     duration.seconds = end.seconds - start.seconds;
   *     duration.nanos = end.nanos - start.nanos;
   *     if (duration.seconds &lt; 0 &amp;&amp; duration.nanos &gt; 0) {
   *       duration.seconds += 1;
   *       duration.nanos -= 1000000000;
   *     } else if (duration.seconds &gt; 0 &amp;&amp; duration.nanos &lt; 0) {
   *       duration.seconds -= 1;
   *       duration.nanos += 1000000000;
   *     }
   * Example 2: Compute Timestamp from Timestamp + Duration in pseudo code.
   *     Timestamp start = ...;
   *     Duration duration = ...;
   *     Timestamp end = ...;
   *     end.seconds = start.seconds + duration.seconds;
   *     end.nanos = start.nanos + duration.nanos;
   *     if (end.nanos &lt; 0) {
   *       end.seconds -= 1;
   *       end.nanos += 1000000000;
   *     } else if (end.nanos &gt;= 1000000000) {
   *       end.seconds += 1;
   *       end.nanos -= 1000000000;
   *     }
   * Example 3: Compute Duration from datetime.timedelta in Python.
   *     td = datetime.timedelta(days=3, minutes=10)
   *     duration = Duration()
   *     duration.FromTimedelta(td)
   * # JSON Mapping
   * In JSON format, the Duration type is encoded as a string rather than an
   * object, where the string ends in the suffix "s" (indicating seconds) and
   * is preceded by the number of seconds, with nanoseconds expressed as
   * fractional seconds. For example, 3 seconds with 0 nanoseconds should be
   * encoded in JSON format as "3s", while 3 seconds and 1 nanosecond should
   * be expressed in JSON format as "3.000000001s", and 3 seconds and 1
   * microsecond should be expressed in JSON format as "3.000001s".
   * </pre>
   *
   * Protobuf type {@code google.protobuf.Duration}
   */
  public static final class Builder extends
      com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
      // @@protoc_insertion_point(builder_implements:google.protobuf.Duration)
      com.google.protobuf.DurationOrBuilder {
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return com.google.protobuf.DurationProto.internal_static_google_protobuf_Duration_descriptor;
    }

    @java.lang.Override
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    // Construct using com.google.protobuf.Duration.newBuilder()
    private Builder() {
      maybeForceBuilderInitialization();
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    private Builder(
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    @java.lang.Override
    public Builder clear() {
      super.clear();
      seconds_ = 0L;

      nanos_ = 0;

      return this;
    }

    @java.lang.Override
    public com.google.protobuf.Descriptors.Descriptor
        getDescriptorForType() {
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    @java.lang.Override
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    @java.lang.Override
    public com.google.protobuf.Duration buildPartial() {
      com.google.protobuf.Duration result = new com.google.protobuf.Duration(this);
      result.seconds_ = seconds_;
      result.nanos_ = nanos_;
      onBuilt();
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    public Builder mergeFrom(com.google.protobuf.Duration other) {
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    private long seconds_ ;
    
Signed seconds of the span of time. Must be from -315,576,000,000
to +315,576,000,000 inclusive. Note: these bounds are computed from:
60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years


int64 seconds = 1;

Returns:The seconds.
/**
     * <pre>
     * Signed seconds of the span of time. Must be from -315,576,000,000
     * to +315,576,000,000 inclusive. Note: these bounds are computed from:
     * 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
     * </pre>
     *
     * <code>int64 seconds = 1;</code>
     * @return The seconds.
     */
    public long getSeconds() {
      return seconds_;
    }
    
Signed seconds of the span of time. Must be from -315,576,000,000
to +315,576,000,000 inclusive. Note: these bounds are computed from:
60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years


int64 seconds = 1;

Params:
  • value – The seconds to set.
Returns:This builder for chaining.
/**
     * <pre>
     * Signed seconds of the span of time. Must be from -315,576,000,000
     * to +315,576,000,000 inclusive. Note: these bounds are computed from:
     * 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
     * </pre>
     *
     * <code>int64 seconds = 1;</code>
     * @param value The seconds to set.
     * @return This builder for chaining.
     */
    public Builder setSeconds(long value) {
      
      seconds_ = value;
      onChanged();
      return this;
    }
    
Signed seconds of the span of time. Must be from -315,576,000,000
to +315,576,000,000 inclusive. Note: these bounds are computed from:
60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years


int64 seconds = 1;

Returns:This builder for chaining.
/**
     * <pre>
     * Signed seconds of the span of time. Must be from -315,576,000,000
     * to +315,576,000,000 inclusive. Note: these bounds are computed from:
     * 60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
     * </pre>
     *
     * <code>int64 seconds = 1;</code>
     * @return This builder for chaining.
     */
    public Builder clearSeconds() {
      
      seconds_ = 0L;
      onChanged();
      return this;
    }

    private int nanos_ ;
    
Signed fractions of a second at nanosecond resolution of the span
of time. Durations less than one second are represented with a 0
`seconds` field and a positive or negative `nanos` field. For durations
of one second or more, a non-zero value for the `nanos` field must be
of the same sign as the `seconds` field. Must be from -999,999,999
to +999,999,999 inclusive.


int32 nanos = 2;

Returns:The nanos.
/**
     * <pre>
     * Signed fractions of a second at nanosecond resolution of the span
     * of time. Durations less than one second are represented with a 0
     * `seconds` field and a positive or negative `nanos` field. For durations
     * of one second or more, a non-zero value for the `nanos` field must be
     * of the same sign as the `seconds` field. Must be from -999,999,999
     * to +999,999,999 inclusive.
     * </pre>
     *
     * <code>int32 nanos = 2;</code>
     * @return The nanos.
     */
    public int getNanos() {
      return nanos_;
    }
    
Signed fractions of a second at nanosecond resolution of the span
of time. Durations less than one second are represented with a 0
`seconds` field and a positive or negative `nanos` field. For durations
of one second or more, a non-zero value for the `nanos` field must be
of the same sign as the `seconds` field. Must be from -999,999,999
to +999,999,999 inclusive.


int32 nanos = 2;

Params:
  • value – The nanos to set.
Returns:This builder for chaining.
/**
     * <pre>
     * Signed fractions of a second at nanosecond resolution of the span
     * of time. Durations less than one second are represented with a 0
     * `seconds` field and a positive or negative `nanos` field. For durations
     * of one second or more, a non-zero value for the `nanos` field must be
     * of the same sign as the `seconds` field. Must be from -999,999,999
     * to +999,999,999 inclusive.
     * </pre>
     *
     * <code>int32 nanos = 2;</code>
     * @param value The nanos to set.
     * @return This builder for chaining.
     */
    public Builder setNanos(int value) {
      
      nanos_ = value;
      onChanged();
      return this;
    }
    
Signed fractions of a second at nanosecond resolution of the span
of time. Durations less than one second are represented with a 0
`seconds` field and a positive or negative `nanos` field. For durations
of one second or more, a non-zero value for the `nanos` field must be
of the same sign as the `seconds` field. Must be from -999,999,999
to +999,999,999 inclusive.


int32 nanos = 2;

Returns:This builder for chaining.
/**
     * <pre>
     * Signed fractions of a second at nanosecond resolution of the span
     * of time. Durations less than one second are represented with a 0
     * `seconds` field and a positive or negative `nanos` field. For durations
     * of one second or more, a non-zero value for the `nanos` field must be
     * of the same sign as the `seconds` field. Must be from -999,999,999
     * to +999,999,999 inclusive.
     * </pre>
     *
     * <code>int32 nanos = 2;</code>
     * @return This builder for chaining.
     */
    public Builder clearNanos() {
      
      nanos_ = 0;
      onChanged();
      return this;
    }
    @java.lang.Override
    public final Builder setUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.setUnknownFields(unknownFields);
    }

    @java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }


    // @@protoc_insertion_point(builder_scope:google.protobuf.Duration)
  }

  // @@protoc_insertion_point(class_scope:google.protobuf.Duration)
  private static final com.google.protobuf.Duration DEFAULT_INSTANCE;
  static {
    DEFAULT_INSTANCE = new com.google.protobuf.Duration();
  }

  public static com.google.protobuf.Duration getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }

  private static final com.google.protobuf.Parser<Duration>
      PARSER = new com.google.protobuf.AbstractParser<Duration>() {
    @java.lang.Override
    public Duration parsePartialFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return new Duration(input, extensionRegistry);
    }
  };

  public static com.google.protobuf.Parser<Duration> parser() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.protobuf.Parser<Duration> getParserForType() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.protobuf.Duration getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }

}