syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"types:"}]}
source_snippet:     types: FxHashMap<Ty<'tcx>, usize>,
context_before:     paths: FxHashMap<(DefId, &'tcx [GenericArg<'tcx>]), usize>,
context_after:     consts: FxHashMap<ty::Const<'tcx>, usize>,