{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"TypeParamProvenance::ArgumentImplTrait"}]}
                        TypeParamProvenance::ArgumentImplTrait => {
                    TypeOrConstParamData::TypeParamData(p) => match p.provenance {
                            let substs = TyBuilder::placeholder_subst(db, id.parent);