{"ast_node_type":"import","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//"}]}
                    // FIXME: this should probably use `args` from `FnDef`
                if let ty::FnDef(..) = ty.kind() {
                    try_visit!(tcx.fn_sig(def_id).instantiate_identity().visit_with(self));