/**
   * Checks if the given object is a valid date object.
   *
   * @param {any} dateObj The object to check.
   * @returns {boolean} True if the object is a valid date object, false otherwise.
   *
   * Example:
   * ```ts
   * console.log(DateHelper.DateHelper.isDateObj(new Date())); // Output: true
   * console.log(DateHelper.DateHelper.isDateObj({})); // Output: false
   * console.log(DateHelper.DateHelper.isDateObj("2022-01-01")); // Output: false
   * ```
   */
export default function isDateObj(dateObj: any): dateObj is Date;