/**
 * Copyright (C) 2016-2019 Michael Kourlas
 *
 * 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 { ICloudFlareResponse, IDnsRecord, IZone } from "./cloudflare";
/**
 * Returns whether or not the value is a string.
 *
 * @private
 */
export declare function isString(val: unknown): val is string;
/**
 * Returns whether or not the value is undefined.
 *
 * @private
 */
export declare function isUndefined(val: unknown): val is undefined;
/**
 * Returns whether or not the value is an object.
 *
 * @private
 */
export declare function isObject(val: unknown): val is Record<string, unknown>;
/**
 * Returns whether or not the value is an array.
 *
 * @private
 */
export declare function isArray(val: unknown): val is unknown[];
/**
 * Returns whether or not the value is a number.
 *
 * @private
 */
export declare function isNumber(val: unknown): val is number;
/**
 * Returns whether or not the value is a boolean.
 *
 * @private
 */
export declare function isBoolean(val: unknown): val is boolean;
/**
 * Returns whether or not the value is an ICloudFlareResponse.
 *
 * @private
 */
export declare function isCloudFlareResponse(val: unknown): val is ICloudFlareResponse;
/**
 * Returns whether or not the value is an IDnsRecord array.
 *
 * @private
 */
export declare function isDnsRecordArray(val: unknown[]): val is IDnsRecord[];
/**
 * Returns whether or not the value is an IZone array.
 *
 * @private
 */
export declare function isZoneArray(val: unknown[]): val is IZone[];