private com.google.protobuf.SingleFieldBuilderV3<com.alipay.sofa.jraft.entity.LocalFileMetaOutter.LocalFileMeta, com.alipay.sofa.jraft.entity.LocalFileMetaOutter.LocalFileMeta.Builder, com.alipay.sofa.jraft.entity.LocalFileMetaOutter.LocalFileMetaOrBuilder> getMetaFieldBuilder() {
                    if (metaBuilder_ == null) {
                        metaBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<com.alipay.sofa.jraft.entity.LocalFileMetaOutter.LocalFileMeta, com.alipay.sofa.jraft.entity.LocalFileMetaOutter.LocalFileMeta.Builder, com.alipay.sofa.jraft.entity.LocalFileMetaOutter.LocalFileMetaOrBuilder>(
                            getMeta(), getParentForChildren(), isClean());
                        meta_ = null;
                    }
                    return metaBuilder_;
                }
<code>optional .jraft.LocalFileMeta meta = 2;</code>
jraft-core/src/main/java/com/alipay/sofa/jraft/entity/LocalStorageOutter.java