export type SideEffectFn = (...args: any[]) => void;
export type Options = {
    isImmediate?: boolean;
    maxWait?: number;
};
export declare const sleep: (ms: number) => Promise<unknown>;
export declare const splitByWhitespace: (str: string) => string[];
export interface DebouncedFunction<F extends SideEffectFn> {
    (this: ThisParameterType<F>, ...args: Parameters<F>): void;
    cancel: () => void;
}
export declare const once: <A extends any[], R, T>(fn: (this: T, ...arg: A) => R) => (this: T, ...arg: A) => R | undefined;
export declare function debounce<F extends SideEffectFn>(func: F, waitMilliseconds?: number, options?: Options): DebouncedFunction<F>;