    # File lib/fog/aws/requests/compute/unmonitor_instances.rb, line 35
            def unmonitor_instances(instance_ids)
              response        = Excon::Response.new
              response.status = 200
              [*instance_ids].each do |instance_id|
                if instance = self.data[:instances][instance_id]
                  instance['monitoring']['state'] = 'enabled'
                else
                  raise Fog::Compute::AWS::NotFound.new("The instance ID '#{instance_ids}' does not exist")
                end
              end
              instances_set = [*instance_ids].inject([]) { |memo, id| memo << {'instanceId' => id, 'monitoring' => 'disabled'} }
              response.body = {'requestId' => 'some_request_id', 'instancesSet' => instances_set}
              response
            end