Epicor.Customization.BPM.IBpmContext Missing

We some external DLL were we pass the BpmContext value into them. It seems that the IBPMContext is no longer in Epicor.Customization.BPM.dll, but when you compile the BPM in Epicor, it still references that interface. has that interface truly been removed or is it protected and no longer available for use in external dll’s.

we are working on upgrading from 10.1.600 to 10.2.500