def models(cls, api_version=DEFAULT_API_VERSION):
        """Module depends on the API version:

           * 2015-08-01: :mod:`v2015_08_01.models<azure.mgmt.eventhub.v2015_08_01.models>`
           * 2017-04-01: :mod:`v2017_04_01.models<azure.mgmt.eventhub.v2017_04_01.models>`
           * 2018-01-01-preview: :mod:`v2018_01_01_preview.models<azure.mgmt.eventhub.v2018_01_01_preview.models>`
        """
        if api_version == '2015-08-01':
            from .v2015_08_01 import models
            return models
        elif api_version == '2017-04-01':
            from .v2017_04_01 import models
            return models
        elif api_version == '2018-01-01-preview':
            from .v2018_01_01_preview import models
            return models
        raise NotImplementedError("APIVersion {} is not available".format(api_version))
Module depends on the API version:

           * 2015-08-01: :mod:`v2015_08_01.models<azure.mgmt.eventhub.v2015_08_01.models>`
           * 2017-04-01: :mod:`v2017_04_01.models<azure.mgmt.eventhub.v2017_04_01.models>`
           * 2018-01-01-preview: :mod:`v2018_01_01_preview.models<azure.mgmt.eventhub.v2018_01_01_preview.models>`