private void maybeForceBuilderInitialization() {
        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
        }
      }
Protobuf type {@code com.taobao.tddl.dbproxy.protocol.TxCommand}
metamorphosis-server/src/main/java/com/taobao/metamorphosis/server/transaction/store/TransactionCommands.java