syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"specialization_graph::ancestors(tcx,"}]}
source_snippet:         specialization_graph::ancestors(tcx, self.def_id, of_impl)
context_before:     ) -> Result<specialization_graph::Ancestors<'tcx>, ErrorGuaranteed> {
context_after:     }