{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":".type_of_opaque_hir_typeck(opaque_type_key.def_id)"}]}
                        .type_of_opaque_hir_typeck(opaque_type_key.def_id)
                    let actual = tcx
                        .instantiate(self.tcx, opaque_type_key.args);