code: def create_vlan_interface(self, interface, subnet, **kwargs):
          
          data = {"subnet": subnet}
          data.update(kwargs)
          return self._request("POST", "network/vif/{0}".format(interface), data)
docs: Create a vlan interface
  
          :param interface: Name of interface to be created.
          :type interface: str
          :param subnet: Subnet associated with interface to be created
          :type subnet: str
          :param \*\*kwargs: See the REST API Guide on your array for the
                             documentation on the request:
                             **POST network/vif/:vlan_interface**
          :type \*\*kwargs: optional
  
          :returns: A dictionary describing the created interface
          :rtype: ResponseDict
  
          .. note::
  
              Requires use of REST API 1.5 or later.