export declare const hasOwn: (value: unknown, key: string | symbol) => key is never;
export declare const isArray: (arg: any) => arg is any[];
export declare const isFunction: (value: any) => value is Function;
export declare const isString: (value: any) => value is string;
export declare const isSymbol: (value: any) => value is symbol;
export declare const isObject: (value: any) => value is Record<any, any>;
export declare const isPromise: <T = any>(value: any) => value is Promise<T>;
export declare const hasChanged: (value: any, oldValue: any) => boolean;