export interface Scheduled<T> {
    intervalSignal(scheduled: Scheduled<T>, data: T): void;
}
export interface Cancellable {
    cancel(): boolean;
}
export interface Scheduler {
    schedule<T>(scheduled: Scheduled<T>, data: T, delayBefore: number, interval: number): Cancellable;
    scheduleOnce<T>(scheduled: Scheduled<T>, data: T, delayBefore: number, interval: number): Cancellable;
    close(): void;
}
export declare class DefaultScheduler implements Scheduler {
    private _tasks;
    private _closed;
    schedule<T>(scheduled: Scheduled<T>, data: T, delayBefore: number, interval: number): Cancellable;
    scheduleOnce<T>(scheduled: Scheduled<T>, data: T, delayBefore: number, _interval: number): Cancellable;
    close(): void;
    isClosed(): boolean;
}
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