{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"|c:"}]}
    |c: ClosureId, subst: &Substitution, f: usize| {
) -> impl FnOnce(ClosureId, &Substitution, usize) -> Ty + '_ {
        let InternedClosure(def, _) = db.lookup_intern_closure(c.into());