meta_data protocol TType fieldvaluemetadata java.io.serializable type istypedeftype typedefname isbinary fieldvaluemetadata type binary this.type type this.istypedeftype this.typedefname this.isbinary binary fieldvaluemetadata type type fieldvaluemetadata type typedefname this.type type this.istypedeftype this.typedefname typedefname this.isbinary istypedef istypedeftype gettypedefname typedefname type ttype.struct type ttype.list type ttype.map type ttype.set isbinary isbinary