syntax_data: {"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let mut tys = extract_component_raw(tcx, typing_env, ty, &mut Default::default());
context_before: ) -> SmallVec<[Ty<'tcx>; 4]> {
context_after:     let mut deduplicate = FxHashSet::default();