{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"self.regioncx.provides_universal_region(r,"}]}
            self.regioncx.provides_universal_region(r, fr, outlived_fr)
        let (blame_constraint, path) = self.regioncx.best_blame_constraint(fr, fr_origin, |r| {
        });