code: public View setTypeface(Context context, @LayoutRes int layoutRes, String typefaceName, int style) {
  		return setTypeface(context, layoutRes, null, typefaceName, 0);
  	}
docs: Set the typeface to the all text views belong to the view group.
  @param context the context.
  @param layoutRes the layout resource id.
  @param typefaceName typeface name.
  @param style the typeface style.
  @return the view.