{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"self.tcx.struct_lockstep_tails_for_codegen(source_ty,"}]}
            self.tcx.struct_lockstep_tails_for_codegen(source_ty, cast_ty, self.typing_env);
        let (src_pointee_ty, dest_pointee_ty) =