recording why this was necessary

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@15680 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/tasks/Maven.java

@@ -264,6 +264,7 @@ public class Maven extends Builder {
      * @deprecated as of 1.286
      *      Use {@link Hudson#getDescriptorByType(Class)} to obtain the current instance.
      *      For compatibility, this field retains the last created {@link DescriptorImpl}.
+     *      TODO: fix sonar plugin that depends on this. That's the only plugin that depends on this field.
      */
     public static DescriptorImpl DESCRIPTOR;