{"ast_node_type":"other","tokens":[{"end":28,"kind":"keyword","start":0,"text":".count()"}]}
            .count() as u32;
            .filter(|a| **a == DiffActivity::Active || **a == DiffActivity::ActiveOnly)
        let (d_sig, new_args, idents, errored) = gen_enzyme_decl(ecx, &sig, &x, span);