/*
 * Copyright (c) 2023 Huawei Device Co., 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.
 */
declare class Utility {
    constructor();
    /**
     * Concatenates two strings.
     * @param {string} str1 - The first string.
     * @param {string} str2 - The second string.
     * @returns {string} The concatenated string.
     */
    concatenateStrings(str1: string, str2: string): string;
    /**
     * A method to check if a number is even.
     * @param {number} num - The number to check.
     * @returns {boolean} True if the number is even, false otherwise.
     */
    isEven(num: number): boolean;
}
declare interface UserProfile {
    username: string;
    age: number;
}
declare function greetUser(user: UserProfile): string;
