public Builder mergeChunk(com.intellij.execution.process.mediator.common.rpc.DataChunk value) {
      if (chunkBuilder_ == null) {
        if (fileHandleOrBufferCase_ == 2 &&
            fileHandleOrBuffer_ != com.intellij.execution.process.mediator.common.rpc.DataChunk.getDefaultInstance()) {
          fileHandleOrBuffer_ = com.intellij.execution.process.mediator.common.rpc.DataChunk.newBuilder((com.intellij.execution.process.mediator.common.rpc.DataChunk) fileHandleOrBuffer_)
              .mergeFrom(value).buildPartial();
        } else {
          fileHandleOrBuffer_ = value;
        }
        onChanged();
      } else {
        if (fileHandleOrBufferCase_ == 2) {
          chunkBuilder_.mergeFrom(value);
        } else {
          chunkBuilder_.setMessage(value);
        }
      }
      fileHandleOrBufferCase_ = 2;
      return this;
    }
public Builder mergeChunk(com.intellij.execution.process.mediator.common.rpc.DataChunk value)