def create_default_category(apps, schema_editor):
    Category = apps.get_model("groups", "Category")
    Category.objects.get_or_create(
        slug='default', name='Default', color='#000000')
Updates a service chain instance.
dataset/ETHPy150Open ofa/connect/open_connect/groups/migrations/0002_add_default_category.py/create_default_category--crossover with--dataset/ETHPy150Open openstack/python-group-based-policy-client/gbpclient/v2_0/client.py/Client.update_servicechain_instance