syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"universe_indices:"}]}
source_snippet:         universe_indices: &'a [Option<ty::UniverseIndex>],
context_before:         mapped_consts: FxIndexMap<ty::PlaceholderConst, ty::BoundConst>,
context_after:         value: T,