Get return value of a dependency factory or
        a live singleton instance.

def get_value(self, name):
        """
        Get return value of a dependency factory or
        a live singleton instance.
        """
        factory = self._registered.get(name)
        if not factory:
            raise KeyError('Name not registered')
        if factory._giveme_singleton:
            if name in self._singletons:
                return self._singletons[name]
            self._singletons[name] = factory()
            return self._singletons[name]
        elif factory._giveme_threadlocal:
            if hasattr(self._threadlocals, name):
                return getattr(self._threadlocals, name)
            setattr(self._threadlocals, name, factory())
            return getattr(self._threadlocals, name)
        return factory()