{"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"ocx:"}]}
    ocx: &'a ObligationCtxt<'a, 'tcx, E>,
struct ImplTraitInTraitCollector<'a, 'tcx, E> {
    types: FxIndexMap<DefId, (Ty<'tcx>, ty::GenericArgsRef<'tcx>)>,