syntax_data: {"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let eq_def_id = self.tcx.require_lang_item(LangItem::PartialEq, source_info.span);
context_before:         let str_ty = self.tcx.types.str_;
context_after:         let method = trait_method(self.tcx, eq_def_id, sym::eq, [str_ty, str_ty]);