declare namespace Ext {
    export namespace util {
        export interface SchedulerConfig {
            listeners?: object;
            preSort?: string | CallableFunction;
            tickDelay?: number;
        }

        export class Scheduler extends Ext.Base  {
            public suspendOnNotify?: boolean;
            public adjustBusy(adjustment?: number): void;
            public getPreSort(): void;
            public getTickDelay(): void;
            public isBusy(): boolean;
            public isIdle(): boolean;
            public notify(): void;
            public setPreSort(): void;
            public setTickDelay(): void;
            public sortItem(item?: object): Ext.util.Scheduler;
            public sortItems(items?: object | object[]): Ext.util.Scheduler;
        }
    }
}