{"ast_node_type":"other","tokens":[{"end":5,"kind":"keyword","start":0,"text":"}"}]}
    }
        dot::LabelText::LabelStr(render_region_vid(self.tcx, *n, self.regioncx).into())
    fn edge_label(&'this self, e: &OutlivesConstraint<'tcx>) -> dot::LabelText<'this> {