public void writeTo(com.google.protobuf.CodedOutputStream output)
                          throws java.io.IOException {
        getSerializedSize();
        if (((bitField0_ & 0x00000001) == 0x00000001)) {
          output.writeInt32(1, start_);
        }
        if (((bitField0_ & 0x00000002) == 0x00000002)) {
          output.writeInt32(2, end_);
        }
        getUnknownFields().writeTo(output);
      }