def load(self, filename, create_if_missing=True):
        filename = Path(filename)
        if not filename.exists() and create_if_missing:
            self.load_pip_requirements()
            with filename.open("w") as f:
                f.write(yaml.dump(self.serialized, default_flow_style=False,
                                  encoding=None))
            self.filename = filename
            return self.save(filename)
        with filename.open() as f:
            for group, requirements in yaml.load(f.read()).items():
                for requirement in requirements:
                    self[group].add(Requirement.coerce(requirement))
        self.filename = filename
def __init__(
        self,
        credential: "AsyncTokenCredential",
        subscription_id: str,
        base_url: str = "https://management.azure.com",
        **kwargs: Any
    ) -> None:
        self._config = SqlVirtualMachineManagementClientConfiguration(credential=credential, subscription_id=subscription_id, **kwargs)
        self._client = AsyncARMPipelineClient(base_url=base_url, config=self._config, **kwargs)

        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
        self._serialize = Serializer(client_models)
        self._deserialize = Deserializer(client_models)
        self._serialize.client_side_validation = False
        self.availability_group_listeners = AvailabilityGroupListenersOperations(self._client, self._config, self._serialize, self._deserialize)
        self.operations = Operations(self._client, self._config, self._serialize, self._deserialize)
        self.sql_virtual_machine_groups = SqlVirtualMachineGroupsOperations(self._client, self._config, self._serialize, self._deserialize)
        self.sql_virtual_machines = SqlVirtualMachinesOperations(self._client, self._config, self._serialize, self._deserialize)