syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"tcx.def_span(type_param.def_id)"}]}
source_snippet:         tcx.def_span(type_param.def_id)
context_before:         let type_param = generics.type_param(self, tcx);
context_after:     }