<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _bind_service(package_name, cls_name, binder=Injected):
 """Bind service to application injector. :param package_name: service package :type package_name: str :param cls_name: service class :type cls_name: str :param binder: current application binder, injected :type binder: Binder """

        module = importlib.import_module(package_name)
        cls = getattr(module, cls_name)

        binder.bind(
            cls,
            to=binder.injector.create_object(cls),
            scope=singleton
        )
        logging.debug("Created {0} binding.".format(cls))