declare module "ext:core/ops" {
  export function op_timer_cancel(unit: null): null;
  export function op_timer_now(unit: null): number;
  export function op_timer_time_origin(unit: null): number;
  export function op_timer_wait(deadline: number): Promise<null>;
  export function op_timer_wait_unreferenced(deadline: number): Promise<null>;
}