export declare type Optional<T> = T | null;
export declare type Hrtime = [number, number];
export declare type AnyFn = (...args: unknown[]) => unknown;
/**
 * Used for generic function to infer function parameters.
 *
 * Example:
 *
 * ```ts
 * function fn<T extends UnknownFn>(cb: T): void {}
 * ```
 */
export declare type UnknownFn = (...args: never[]) => unknown;