/**
 * Remove an item from an array.
 */
export declare function remove(arr: Array<any>, item: any): Array<any> | void;
/**
 * Perform no operation.
 * Stubbing args to make Flow happy without leaving useless transpiled code
 * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
 */
export declare function noop(a?: any, b?: any, c?: any): void;
/**
 * Quick object check - this is primarily used to tell
 * Objects from primitive values when we know the value
 * is a JSON-compliant type.
 */
export declare function isObject(obj: any): boolean;
export declare function hasOwn(obj: Object | Array<any>, key: string): boolean;
export declare function isDef(v: any): boolean;
/**
 * Strict object type check. Only returns true
 * for plain JavaScript objects.
 */
export declare function isPlainObject(obj: any): boolean;
export declare function isPromise(val: any): boolean;