def METHOD_NAME(user_api_client, registration):
    signup_group = SignUpGroupFactory(registration=registration)
    SignUpFactory(registration=registration, signup_group=signup_group)
    SignUpFactory(registration=registration, signup_group=signup_group)
    response = assert_get_detail(user_api_client, signup_group.id)
    assert len(response.json()["signups"]) == 2
    assert_signup_group_fields_exist(response.data)