public com.google.protobuf.ByteString
          getSyncModeBytes() {
        java.lang.Object ref = syncMode_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b = 
              com.google.protobuf.ByteString.copyFromUtf8(
                  (java.lang.String) ref);
          syncMode_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<code>optional int64 size = 12;</code>

<pre>
* eventsize *
</pre>
node/etl/src/main/java/com/alibaba/otter/node/etl/model/protobuf/BatchProto.java