/**
 * Waits for provided milliseconds.
 * Useful for testing asynchronous operations.
 */
export declare const sleep: (ms: number) => Promise<unknown>;
/**
 * Uses performance API to measure callback's execution performance.
 */
export declare const logPerformance: <T>(name: string, callback: () => T) => T;
/**
 * Throws a "not implemented" error.
 * Useful when implementing a feature partially in development environments.
 */
export declare const notImplementedError: () => never;
/**
 * Shows a "not implemented" alert.
 * Useful when implementing a feature partially in development environments.
 */
export declare const notImplementedAlert: () => void;