def find_service_references(
        self, clazz=None, ldap_filter=None, only_one=False
    ):
        # type: (Optional[str], Optional[str], bool) -> Optional[List[ServiceReference]]
        """
        Finds all services references matching the given filter.

        :param clazz: Class implemented by the service
        :param ldap_filter: Service filter
        :param only_one: Return the first matching service reference only
        :return: A list of found reference, or None
        :raise BundleException: An error occurred looking for service
                                references
        """
        return self._registry.find_service_references(
            clazz, ldap_filter, only_one
        )
Finds all services references matching the given filter.

        :param clazz: Class implemented by the service
        :param ldap_filter: Service filter
        :param only_one: Return the first matching service reference only
        :return: A list of found reference, or None
        :raise BundleException: An error occurred looking for service
                                references