def _assert_host_exists(self, context, host_name, must_be_up=False):
        pass
Create or update a DocumentMeta with the given parameters.
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/compute/cells_api.py/HostAPI._assert_host_exists--crossover with--dataset/ETHPy150Open hypothesis/h/h/api/models/document.py/create_or_update_document_meta