    # File lib/fog/aws/requests/compute/deregister_image.rb, line 32
            def deregister_image(image_id)
              response = Excon::Response.new
              if image_id
                response.status = 200
                response.body = {
                  'requestId' => Fog::AWS::Mock.request_id,
                  'return' => "true"
                }
                response
              else
                message = 'MissingParameter => '
                if !instance_id
                  message << 'The request must contain the parameter image_id'
                end
                raise Fog::Compute::AWS::Error.new(message)
              end
            end