Here is an example (this code filled in your preferences and classes and was added to the plugin.xml file):
<extension point="org.eclipse.ui.popupMenus"> <objectContribution adaptable="true" id="" nameFilter="" objectClass="org.eclipse.core.resources.IFile"> <action id="org.eclipse.ui.articles.action.contribution.object.action1" label="" icon="" menubarPath="additions" class=""> </action> </objectContribution> </extension>
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