code: public static void startDialer(@NonNull final Context context, final long phoneNumber) {
          startDialer(context, Long.toString(phoneNumber));
      }
docs: Starts the dialer in order to call a specific phone number. The call has to be manually
  started by the user. If an error occurs while starting the dialer, an {@link
  ActivityNotFoundException} will be thrown.
  
  @param context
  The context, the dialer should be started from, as an instance of the class {@link
  Context}. The context may not be null
  @param phoneNumber
  The phone number, which should be dialed, as a {@link Long} value