EZKnobOld?

I’m porting some old code and currently try to find the doc of the “old” EZKnob. Unfortunately I don’t find such a quark called EZKnobOld. Does anyone have some pointers?

From the EZKnob helpfile

WARNING: EZKnob replaces the EZKnob Quark, which is now called EZKnobOld. It is encouraged to update your code. The two classes have different creation methods and approaches, particularly concerning the dimensions (now bounds). To make the conversion process easier, EZKnobOld has an instance method called convert which will post the equivalent creation code for the new EZKnob.

I think this is a mistake. I would comb through this documentation history and the class history but there’s no other mention of EZKnobOld. My guess is someone probably intended for there to be one and then decided not to and forgot about the documentation.