def update(self, *args, **kwargs):
        raise MethodNotImplemented()
Atomic store conditional.  Stores _value_ into dictionary
dataset/ETHPy150Open toastdriven/restless/restless/resources.py/Resource.update--crossover with--dataset/ETHPy150Open ejeschke/ginga/ginga/misc/Bunch.py/threadSafeBunch.setdefault