{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"self.free_regions.lub_param_regions(self.tcx,"}]}
        self.free_regions.lub_param_regions(self.tcx, r_a, r_b)
    pub(crate) fn lub_param_regions(&self, r_a: Region<'tcx>, r_b: Region<'tcx>) -> Region<'tcx> {
    }