code: private void obtainDialogMessage(@NonNull final TypedArray typedArray) {
          setDialogMessage(typedArray.getText(R.styleable.DialogPreference_android_dialogMessage));
      }
docs: Obtains the message of the dialog, which is shown by the preference, from a specific typed
  array.
  
  @param typedArray
  The typed array, the message should be obtained from, as an instance of the class
  {@link TypedArray}. The typed array may not be null