--- /dev/null
+<?php
+
+namespace Drupal\image_test\Plugin\ImageToolkit\Operation\test;
+
+/**
+ * Builds an image toolkit operation.
+ *
+ * @ImageToolkitOperation(
+ * id = "bar",
+ * toolkit = "test",
+ * operation = "invert",
+ * label = @Translation("Invert"),
+ * description = @Translation("Bar.")
+ * )
+ */
+class Bar extends OperationBase { }