private com.google.protobuf.SingleFieldBuilderV3<com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMeta, com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMeta.Builder, com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMetaOrBuilder> getMetaFieldBuilder() {
                if (metaBuilder_ == null) {
                    metaBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMeta, com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMeta.Builder, com.alipay.sofa.jraft.entity.RaftOutter.SnapshotMetaOrBuilder>(
                        getMeta(), getParentForChildren(), isClean());
                    meta_ = null;
                }
                return metaBuilder_;
            }
<code>optional .jraft.SnapshotMeta meta = 1;</code>
jraft-core/src/main/java/com/alipay/sofa/jraft/entity/LocalStorageOutter.java