public Builder mergeMeta(com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMeta value) {
                if (metaBuilder_ == null) {
                    if (((bitField0_ & 0x00000010) == 0x00000010) && meta_ != null
                        && meta_ != com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMeta.getDefaultInstance()) {
                        meta_ = com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMeta.newBuilder(meta_).mergeFrom(value)
                            .buildPartial();
                    } else {
                        meta_ = value;
                    }
                    onChanged();
                } else {
                    metaBuilder_.mergeFrom(value);
                }
                bitField0_ |= 0x00000010;
                return this;
            }
<code>required .jraft.SnapshotMeta meta = 5;</code>
jraft-core/src/main/java/com/alipay/sofa/jraft/rpc/RpcRequests.java