def is_model_registered(app_label, model_name):
    try:
        apps.get_registered_model(app_label, model_name)
    except LookupError:
        return False
    else:
        return True
Return the list of query params for the mlt query.
dataset/ETHPy150Open django-oscar/django-oscar/src/oscar/core/loading.py/is_model_registered--crossover with--dataset/ETHPy150Open truemped/dopplr/dopplr/solr/query/mlt.py/MoreLikeThisQuery.get_params