syntax_data: {"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"&&"}]}
source_snippet:             && let generics = self.tcx().generics_of(fn_def_id)
context_before:             && alias_ty.def_id == def_id
context_after:             // FIXME(return_type_notation): We only support lifetime params for now.