public com.google.protobuf.Descriptors.Descriptor
          getDescriptorForType() {
        return com.taobao.metamorphosis.server.transaction.store.TransactionCommands.internal_static_com_taobao_tddl_dbproxy_protocol_TxCommand_descriptor;
      }
Protobuf type {@code com.taobao.tddl.dbproxy.protocol.TxCommand}
metamorphosis-server/src/main/java/com/taobao/metamorphosis/server/transaction/store/TransactionCommands.java