/**
 * Renders an error and exits process with 1
 * Error with code and message displayed as 'Error (<code>): <message>'
 * @param code Error code to display
 * @param message Error message to display
 * @param err Optional error object to display
 */
export declare function renderCriticalError(code: string, message: string, err?: any): never;
/**
 * Renders a cancelled message and exits process with 0
 * @param message Message to display
 */
export declare function renderCancelled(message?: string): never;