{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"self.check_trait_fn_not_const(sig.header.constness,"}]}
                self.check_trait_fn_not_const(sig.header.constness, parent);
            if let AssocItemKind::Fn(box Fn { sig, .. }) = &item.kind {
            }