code: function parse(text, visibleTextOnly) {
      var parser = new Parser();
      var email = parser.parse(text);
  
      if (visibleTextOnly) {
          if (!email) return '';
          else return email.getVisibleText();
      } else return email;
  }
docs: Parses the given text into an email
  @param {string} text the email text to parse
  @param {boolean} [visibleTextOnly] if true, the visible text will be returned instead of an Email
  @returns {Email|string} the parsed Email or visible text, depending on the second argument