syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"Some(self.tcx.impl_trait_ref(parent)?.instantiate_identity())"}]}
source_snippet:             Some(self.tcx.impl_trait_ref(parent)?.instantiate_identity())
context_before:         if matches!(self.tcx.def_kind(parent), DefKind::Impl { .. }) {
context_after:         } else {