import { Collection } from "@tsplus/stdlib/collections/Collection/definition";
export declare function isDefined<T>(value: T | undefined): value is T;
export declare function isIterable(value: object): value is Collection<unknown>;
export declare function isPlainObject(value: any): boolean;
export declare function isPromiseLike(value: any): boolean;
export declare function isReactElement(value: any): boolean;
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