text: const message = {
    /**
     * Greeting
     * @param {string} name
     * @param {int} birthdate
     * @return {string}
     */
    sayHello: function(name, birthdate) {
      /**
       * Add two numbers
       * @param {int} birthdate
       * @return {int}
       */
      function getAge(birthdate) {
        return 2019 - birthdate;
      }
  
      const age = getAge(1985);
  
      return `Hello ${name}. Your are ${age} year old.`;
    },
  };
  
  message.sayHello('Ben', 1985);
  