    # File lib/fog/ninefold/models/compute/ip_forwarding_rule.rb, line 49
            def save
              raise "Operation not supported" if self.identity
              requires :ipaddressid
              requires :protocol
              requires :startport

              options = {
                :ipaddressid => ipaddressid,
                :protocol => protocol,
                :startport => startport,
                :endport => endport
              }.delete_if {|k,v| v.nil? || v == "" }
              data = service.create_ip_forwarding_rule(options)
              merge_attributes(data)
              true
            end