import { Predicate, PredicateProducer } from './type';
export declare const isNot: PredicateProducer;
export declare function isUndefinedOrEmpty<T>(coll: Object | Array<T> | string | undefined): boolean;
export declare const isDefined: Predicate<any>;
export declare const isUndefined: Predicate<any>;
export declare function isEmpty<T>(coll: Object | Array<T>): boolean;
export declare const flip: (v: boolean) => boolean;
export declare const isArray: Predicate<any>;
export declare const isObject: Predicate<any>;
export declare const isString: Predicate<any>;