syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"characteristic_def_id_of_type_cached(ty,"}]}
source_snippet:     characteristic_def_id_of_type_cached(ty, &mut SsoHashSet::new())
context_before: pub fn characteristic_def_id_of_type(ty: Ty<'_>) -> Option<DefId> {
context_after: }