code: private void obtainHint(@NonNull final TypedArray typedArray) {
          setHint(typedArray.getText(R.styleable.EditTextPreference_android_hint));
      }
docs: Obtains the hint of the edit text widget, which is shown in the preference's dialog, from a
  specific typed array.
  
  @param typedArray
  The typed array, the hint should be obtained from, as an instance of the class {@link
  TypedArray}. The typed array may not be null