export interface DebouncedFunction<T extends (...args: any[]) => any> {
    (...args: Parameters<T>): void;
    cancel(): void;
    flush(): void;
    pending(): boolean;
}
export declare function debounce<T extends (...args: any[]) => any>(fn: T, delay: number): DebouncedFunction<T>;
export declare class Mutex<T> {
    private _rawValue;
    constructor(_rawValue: T);
    private lock;
    acquire(): Promise<Guard<T>>;
    runExclusive<U>(fn: (v: T) => U): Promise<U>;
}
export declare class Guard<T> {
    value: T;
    release: () => void;
    constructor(value: T, release: () => void);
}
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