16     parse_quote, spanned::Spanned as _, Data, DataEnum, DataStruct, DataUnion, DeriveInput, Error,
162 impl DataExt for Data {  implementation
165             Data::Struct(strc) => strc.fields(),  in fields()
166             Data::Enum(enm) => enm.fields(),  in fields()
167             Data::Union(un) => un.fields(),  in fields()
173             Data::Struct(strc) => strc.variants(),  in variants()
174             Data::Enum(enm) => enm.variants(),  in variants()
175             Data::Union(un) => un.variants(),  in variants()
181             Data::Struct(strc) => strc.tag(),  in tag()
182             Data::Enum(enm) => enm.tag(),  in tag()
183             Data::Union(un) => un.tag(),  in tag()