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. 
public interface com.google.protobuf.StructOrBuilder extends com.google.protobuf.MessageOrBuilder
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.protobuf.StructOrBuilder
  super_class: java.lang.Object
{
  public abstract int getFieldsCount();
    descriptor: ()I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract boolean containsFields(java.lang.String);
    descriptor: (Ljava/lang/String;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      key   

  public abstract java.util.Map<java.lang.String, com.google.protobuf.Value> getFields();
    descriptor: ()Ljava/util/Map;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Map<Ljava/lang/String;Lcom/google/protobuf/Value;>;
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()

  public abstract java.util.Map<java.lang.String, com.google.protobuf.Value> getFieldsMap();
    descriptor: ()Ljava/util/Map;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Map<Ljava/lang/String;Lcom/google/protobuf/Value;>;

  public abstract com.google.protobuf.Value getFieldsOrDefault(java.lang.String, com.google.protobuf.Value);
    descriptor: (Ljava/lang/String;Lcom/google/protobuf/Value;)Lcom/google/protobuf/Value;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
              Name  Flags
      key           
      defaultValue  

  public abstract com.google.protobuf.Value getFieldsOrThrow(java.lang.String);
    descriptor: (Ljava/lang/String;)Lcom/google/protobuf/Value;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      key   
}
SourceFile: "StructOrBuilder.java"