    # File lib/fog/brightbox/models/compute/firewall_rule.rb, line 26
            def save
              raise Fog::Errors::Error.new('Resaving an existing object may create a duplicate') if persisted?
              requires :firewall_policy_id
              options = {
                :firewall_policy => firewall_policy_id,
                :protocol => protocol,
                :description => description,
                :source => source,
                :source_port => source_port,
                :destination => destination,
                :destination_port => destination_port,
                :icmp_type_name => icmp_type_name
              }.delete_if {|k,v| v.nil? || v == "" }
              data = service.create_firewall_rule(options)
              merge_attributes(data)
              true
            end