syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"GenericArgs::for_item(tcx,"}]}
source_snippet:                         GenericArgs::for_item(tcx, def_id, |param, _| match param.kind {
context_before:                         ty::TypingEnv::fully_monomorphized(),
context_after:                             GenericParamDefKind::Lifetime => tcx.lifetimes.re_erased.into(),