Implemented UGenMethodMixin.__graph__().
Implemented UGenMethodMixin.__graph__().

You can now call abjad.graph() on any UGen or UGenArray.

josiah-wolf-oberholtzer/supriya,Pulgama/supriya,Pulgama/supriya,Pulgama/supriya,andrewyoung1991/supriya,andrewyoung1991/supriya,andrewyoung1991/supriya,Pulgama/supriya