syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"self.instantiate_supertrait(tcx,"}]}
source_snippet:         self.instantiate_supertrait(tcx, trait_ref)
context_before:     fn instantiate_supertrait(self, tcx: TyCtxt<'tcx>, trait_ref: ty::PolyTraitRef<'tcx>) -> Self {
context_after:     }