{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"pub(crate)"}]}
    pub(crate) constraint_sccs: Sccs<RegionVid, ConstraintSccIndex>,
pub(crate) struct LoweredConstraints<'tcx> {
    pub(crate) definitions: Frozen<IndexVec<RegionVid, RegionDefinition<'tcx>>>,