code: @RequiresPermission(Manifest.permission.CALL_PHONE)
      public static void startCall(@NonNull final Context context, final int phoneNumber) {
          startDialer(context, Integer.toString(phoneNumber));
      }
docs: Starts the dialer in order to call a specific phone number. The call is immediately started,
  requiring the invoking app to have the permission <code>android.permission.CALL_PHONE</code>
  granted, otherwise a {@link SecurityException} will be thrown. 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 called, as an {@link Integer} value