setCircular for a RoundedBitmapDrawable doesn't exist

Question

I'm trying to create a Circular image view by using the following code:

Bitmap bitmap = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.user);
RoundedBitmapDrawable drawable = RoundedBitmapDrawableFactory.create(mContext.getResources(), bitmap);
drawable.setCircular(true);

I saw this example in many tutorials and in Android's developers page:

http://developer.android.com/reference/android/support/v4/graphics/drawable/RoundedBitmapDrawable.html

this is the explanation of setCircular function:

public void setCircular (boolean circular)

Sets the image shape to circular.

What am I missing here?

I tried to look at the source of the RoundedBitmapDrawable in Android Studio and indeed there is no setCircular function. My target API is 22.