export type PendingTasks<K extends string> = {
    default: number;
} & PartialRecord<K, number>;
export interface TaskCounter<K extends string> {
    /** true - while has at least 1 running task by key. */
    isPending: (key?: keyof PendingTasks<K>) => boolean;
    /** true - while has at least 1 running task. */
    isAnyPending: () => boolean;
    push: (key?: keyof PendingTasks<K>) => void;
    pop: (key?: keyof PendingTasks<K>) => void;
    reset: (key?: keyof PendingTasks<K>) => void;
    resetAll: VoidFunction;
}
export interface TaskCounterOptions<K extends string> {
    pendingTasks?: PendingTasks<K> | undefined;
    resetTask?: ((tasks: NonNullable<this['pendingTasks']>, key: keyof NonNullable<this['pendingTasks']>) => void) | undefined;
    onPending?: VoidFunction | undefined;
    onIdle?: VoidFunction | undefined;
    onStartTask?: ((task: keyof NonNullable<this['pendingTasks']>) => void) | undefined;
    onEndTask?: ((task: keyof NonNullable<this['pendingTasks']>) => void) | undefined;
}
export declare function getTaskCounter<K extends string = never>({ pendingTasks, resetTask, onPending, onIdle, onStartTask, onEndTask, }: TaskCounterOptions<K>): TaskCounter<K>;