export declare type Optional<T> = T | undefined;
export declare type Nullable<T> = T | null;
export declare type ValueOf<T> = T[keyof T];
export declare const not: (...args: any[]) => any;
/**
 *
 * @param {Nullable<T> | undefined} expression
 * @return {boolean}
 */
export declare const bool: <T>(expression?: T) => boolean;
interface IsOdd {
    (number: number): boolean;
}
export declare const isOdd: IsOdd;
export declare const alwaysTrue: () => true;
export {};