{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"Self::check_decl_no_pat(&sig.decl,"}]}
            Self::check_decl_no_pat(&sig.decl, |span, ident, mut_ident| {
        if let FnKind::Fn(ctxt, _, Fn { body: None, sig, .. }) = fk {
                if mut_ident && matches!(ctxt, FnCtxt::Assoc(_)) {