syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"self.ctxt().outer_expn_data().kind,"}]}
source_snippet:             self.ctxt().outer_expn_data().kind,
context_before:         matches!(
context_after:             ExpnKind::Desugaring(DesugaringKind::Async | DesugaringKind::Await),