Adding Custom Persistent Highlights
The Author API includes a class that
            allows you to create or remove custom persistent highlights, set new properties for
            the
            highlights, and customize their appearance. An example of a possible use case would
            be if you
            want to implement your own way of editing review comments. The custom persistent highlights
            get serialized in the XML document as processing instructions, with the following
            format:
         
<?oxy_custom_start prop1="val1"....?> xml content
               <?oxy_custom_end?>
This functionality is available through the  AuthorPersistentHighlighter class
            that is accessible through the AuthorEditorAccess#getPersistentHighlighter() method.
         
For more information, see the JavaDoc details for this class at https://www.oxygenxml.com/InstData/Editor/SDK/javadoc/ro/sync/ecss/extensions/api/highlights/AuthorPersistentHighlighter.html.
