/**
 * Copyright 2019, SumUp Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type { ComponentType } from 'react';
export declare function isFunction(value?: unknown): value is Function;
export declare function isString(value?: unknown): value is string;
export declare function isNumber(value?: unknown): value is number;
export declare function isArray<T>(value?: unknown): value is T[];
export declare function isObject<T extends Record<string, unknown>>(value: unknown): value is T;
export declare function isNil(value?: unknown): value is null | undefined;
export declare function isHTMLElement(element: unknown): element is HTMLElement;
export declare function isReactComponent(component: unknown): component is Function | ComponentType;