import { IDisposable } from '../../disposables';
export { DisposableStore, IDisposable } from '../../disposables';
export declare function markAsDisposed(_obj: any): void;
export declare function trackDisposable(_obj: any): void;
export declare function assertFn(_condition: () => boolean): void;
export declare function toDisposable(fn: () => void): IDisposable;
export declare class BugIndicatingError extends Error {
    constructor(message?: string);
}
export declare function onBugIndicatingError(error: any): void;
export declare function onUnexpectedError(error: any): void;
export type EqualityComparer<T> = (a: T, b: T) => boolean;
/**
 * Compares two items for equality using strict equality.
*/
export declare const strictEquals: EqualityComparer<any>;
export interface IValueWithChangeEvent<T> {
    readonly onDidChange: Event<void>;
    get value(): T;
}
export interface Event<T> {
    (listener: (e: T) => any, thisArgs?: any): IDisposable;
}
export declare function isDefined<T>(arg: T | undefined | null): arg is T;
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