<extension point="org.eclipse.ui.editorActions">
    <editorContribution
          targetID="example.editor"
          id="example.rulerActions">
       <action
             label="Not Used"
             class="org.eclipse.debug.ui.actions.RulerToggleBreakpointActionDelegate"
             style="push"
             actionID="RulerDoubleClick"
             id="example.doubleClickBreakpointAction"/>
    </editorContribution>
 </extension>

 <extension point="org.eclipse.ui.popupMenus">
   <viewerContribution
     targetID="example.rulerContextMenuId"
     id="example.RulerPopupActions">
       <action
         label="Toggle Breakpoint"
         class="org.eclipse.debug.ui.actions.RulerToggleBreakpointActionDelegate"
         menubarPath="additions"
         id="example.rulerContextMenu.toggleBreakpointAction">
       </action>
   </viewerContribution>