code: public ApnsPayloadBuilder setAlertTitle(final String alertTitle) {
          this.alertTitle = alertTitle;
  
          this.localizedAlertTitleKey = null;
          this.localizedAlertTitleArguments = null;
  
          return this;
      }
docs: <p>Sets a short description of the notification purpose. Clears any previously-set localized title key and
  arguments. The Apple Watch will display the title as part of the notification. According to Apple's
  documentation, this should be:</p>
  
  <blockquote>A short string describing the purpose of the notification. Apple Watch displays this string as part
  of the notification interface. This string is displayed only briefly and should be crafted so that it can be
  understood quickly.</blockquote>
  
  <p>By default, no title is included.</p>
  
  @param alertTitle the description to be shown for this push notification
  
  @return a reference to this payload builder
  
  @see ApnsPayloadBuilder#setLocalizedAlertTitle(String, String...)