Defines the type of Firewall Group. These groups can be used in Firewall Rules to define rules that are scoped to the IP Addresses/Members defined in a Firewall Group.
IP_SETshould be used when using particular IP Addresses of VMs, Networks, etc.
SECURITY_GROUPshould be used when specifying exact members such as a particular Org vDC Network.
Enumeration: IP_SET, SECURITY_GROUP,