code: def create(cls, isc_name, isc_policy_id, isc_traffic_tag, vss_container):
          
          container = element_resolver(vss_container)
          return ElementCreator(cls,
              href=container + '/vss_context',
              json = {
                  'vc_isc': {
                      'isc_name': isc_name,
                      'isc_policy_id': isc_policy_id,
                      'isc_traffic_tag': isc_traffic_tag
                  }
              })
docs: Create the VSS Context within the VSSContainer
  
          :param str name: ISC name, possibly append policy name??
          :param str isc_policy_id: Policy ID in SMC (the 'key' attribute)
          :param str isc_traffic_tag: NSX groupId (serviceprofile-145)
          :param VSSContainer vss_container: VSS Container to get create
              context
          :raises CreateElementFailed
          :rtype: VSSContext