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.RpcController
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.protobuf.RpcController
  super_class: java.lang.Object
{
  public abstract void reset();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract boolean failed();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.lang.String errorText();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void startCancel();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void setFailed(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      reason  

  public abstract boolean isCanceled();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void notifyOnCancel(com.google.protobuf.RpcCallback<java.lang.Object>);
    descriptor: (Lcom/google/protobuf/RpcCallback;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Lcom/google/protobuf/RpcCallback<Ljava/lang/Object;>;)V
    MethodParameters:
          Name  Flags
      callback  
}
SourceFile: "RpcController.java"