{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"missing_assoc_types:"}]}
        missing_assoc_types: FxIndexSet<(DefId, ty::PolyTraitRef<'tcx>)>,
        spans: SmallVec<[Span; 1]>,
        potential_assoc_types: Vec<usize>,