Option Page Plugin Extension
This extension type allows developers to add custom preference pages to the application
         Preferences dialog box.
      
      The extension must implement the
            ro.sync.exml.plugin.option.OptionPagePluginExtension interface. The
            provided callbacks allow the developer to create the custom Swing component that
            will be added to the page and to react to various calls to persistently save the page
            settings
            using the OptionsStorage API. 
         
All preferences pages that are contributed by a plugin appear listed in the
            Preferences dialog box in the Plugins category. The
            plugin.xml configuration file can specify one or more such extensions
            using constructs like
            this:
<extension type="OptionPage" class="my.pack.CustomOptionPagePluginExtension"/>
