    # File lib/fog/cloudstack/models/compute/security_groups.rb, line 16
            def get(security_group_id)
              if security_group = connection.list_security_groups('id' => security_group_id)["listsecuritygroupsresponse"]["securitygroup"].first
                new(security_group)
              end
            rescue Fog::Compute::Cloudstack::BadRequest
              nil
            end