public Builder clear() {
        super.clear();
        cmdType_ = com.taobao.metamorphosis.server.transaction.store.TransactionCommands.TxCommandType.APPEND_MSG;
        bitField0_ = (bitField0_ & ~0x00000001);
        cmdContent_ = com.google.protobuf.ByteString.EMPTY;
        bitField0_ = (bitField0_ & ~0x00000002);
        force_ = false;
        bitField0_ = (bitField0_ & ~0x00000004);
        return this;
      }
Protobuf type {@code com.taobao.tddl.dbproxy.protocol.TxCommand}
metamorphosis-server/src/main/java/com/taobao/metamorphosis/server/transaction/store/TransactionCommands.java