{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"CallableDefId::FunctionId(f)"}]}
        CallableDefId::FunctionId(f) => fn_sig_for_fn(db, f),
    match def {
        CallableDefId::StructId(s) => fn_sig_for_struct_constructor(db, s),