def exists(classObj, *args, **kwargs):
        instanceID = classObj._safeID(*args, **kwargs)
        return instanceID in classObj._instanceMap
Check to see which extension modules to build and then build them.
dataset/ETHPy150Open OrbitzWorldwide/droned/romeo/lib/romeo/entity.py/ParameterizedSingleton.exists--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/dist.py/build_ext_twisted.build_extensions