import * as Scheduler from '../scheduler' ; import { PriorityLevel } from '../scheduler/SchedulerPriorities' ; export const now = Scheduler . unstable_now ; export type SchedulerCallback = ( isSync : boolean ) => SchedulerCallback | null ; export const scheduleCallback = Scheduler . unstable_scheduleCallback ; export const NormalPriority = Scheduler . unstable_NormalPriority ; export const ImmediatePriority = Scheduler . unstable_ImmediatePriority ; export const shouldYield = Scheduler . unstable_shouldYield ; export const cancelCallback = Scheduler . unstable_cancelCallback ;