SynthInterface no longer inherits from collections.MutableMapping.
SynthInterface no longer inherits from collections.MutableMapping.

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