/**
 * Tests whether is object not `null` and not `undefined` at the same time
 * @param obj - Object to be tested
 */
export declare function isPresent<TObj>(obj: TObj): obj is NonNullable<TObj>;
/**
 * Tests whether is object `null` or `undefined`
 * @param obj - Object to be tested
 */
export declare function isBlank(obj: any): obj is null | undefined;
/**
 * Tests whether is object instance of `boolean`
 * @param obj - Object to be tested
 */
export declare function isBoolean(obj: any): obj is boolean;
/**
 * Tests whether is object instance of number
 * @param obj - Object to be tested
 */
export declare function isNumber(obj: any): obj is number;
/**
 * Tests whether is object instance of string
 * @param obj - Object to be tested
 */
export declare function isString(obj: any): obj is string;
/**
 * Tests whether is object instance of function
 * @param obj - Object to be tested
 */
export declare function isFunction(obj: any): obj is Function;
export declare function isType(obj: any): obj is Function;
export declare function isStringMap(obj: any): obj is Object;
export declare function isStrictStringMap(obj: any): boolean;
export declare function isArray(obj: any): obj is Array<any>;
export declare function isDate(obj: any): obj is Date;
export declare function noop(): void;
export declare function normalizeBlank<TObj extends Object>(obj: TObj | undefined | null): TObj | null;
export declare function isJsObject(o: any): o is Function | Object;
export declare function isPrimitive(obj: any): boolean;
export declare function hasConstructor(value: Object, type: any): boolean;
export declare function isEmptyObject(obj: any): boolean;
/**
 * Test two values for strict equality, accounting for the fact that `NaN !== NaN`.
 */
export declare function isStrictEquals(value1: unknown, value2: unknown): boolean;
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