/**
 * A utility class.
 * @class
 */
export declare class Utils {
    constructor();
    /**
     * Fetches the list of leagues for the game.
     * @returns {string[]} The array of league names.
     * @throws {Error} If there's an error fetching the leagues.
     */
    getLeagues(): Promise<string[]>;
    /**
     * Filters properties of objects in an array based on the specified properties.
     *
     * @param {object[]} data - The array of objects to filter.
     * @param {string[]} properties - The array of property names to include in the result.
     * @returns {Promise<object[]>} - An array of objects with only the specified properties.
     * @throws {Error} If there's an error filtering the properties.
     */
    filterProperties(data: object[], properties: string[]): Promise<object[]>;
}