{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"only_consider_snapshot:"}]}
        only_consider_snapshot: Option<&CombinedSnapshot<'tcx>>,
        region_constraints: &RegionConstraintCollector<'_, 'tcx>,
        mut each_edge: impl FnMut(ty::Region<'tcx>, ty::Region<'tcx>),