def cache(self, dependency: Dependency, value):
        """
        Store an instance of dependency in the cache.
        Does nothing if dependency is NOT a threadlocal
        or a singleton.  

        :param dependency: The ``Dependency`` to cache
        :param value: The value to cache for dependency

        :type dependency: Dependency
        """
        if dependency.threadlocal:
            setattr(self._local, dependency.name, value)
        elif dependency.singleton:
            self._singleton[dependency.name] = value
Store an instance of dependency in the cache.
        Does nothing if dependency is NOT a threadlocal
        or a singleton.  

        :param dependency: The ``Dependency`` to cache
        :param value: The value to cache for dependency

        :type dependency: Dependency