public void writeTo(com.google.protobuf.CodedOutputStream output)
                        throws java.io.IOException {
      getSerializedSize();
      if (((bitField0_ & 0x00000001) == 0x00000001)) {
        output.writeEnum(1, cmdType_.getNumber());
      }
      if (((bitField0_ & 0x00000002) == 0x00000002)) {
        output.writeBytes(2, cmdContent_);
      }
      if (((bitField0_ & 0x00000004) == 0x00000004)) {
        output.writeBool(3, force_);
      }
      getUnknownFields().writeTo(output);
    }
<code>optional bool force = 3 [default = false];</code>
metamorphosis-server/src/main/java/com/taobao/metamorphosis/server/transaction/store/TransactionCommands.java