@classmethod
def matches_urlpath(cls, urlpath):
    """
        If you have more than one BaseCrAdminInstance in a single Django
        instance, you have to implement this classmethod on each of the
        instances to be able to lookup/detect the _current_ BaseCrAdminInstance.

        Parameters:
            urlpath: The url path (HttpRequest.path) to match against.

        Returns:
            ``True`` if the given urlpath is for a view within this CrAdmin instance.
        """
    raise NotImplementedError()
