{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"FloatUnificationTable(sv::UndoLog<ut::Delegate<ty::FloatVid>>),"}]}
    FloatUnificationTable(sv::UndoLog<ut::Delegate<ty::FloatVid>>),
    IntUnificationTable(sv::UndoLog<ut::Delegate<ty::IntVid>>),
    RegionConstraintCollector(region_constraints::UndoLog<'tcx>),