public final Builder mergeUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
                    return super.mergeUnknownFields(unknownFields);
                }
<code>optional .jraft.LocalFileMeta meta = 2;</code>
jraft-core/src/main/java/com/alipay/sofa/jraft/entity/LocalStorageOutter.java