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It would be nice for integrations like Mylyn to have an easy way to expand and collapse elements by asking the CEditor to expand or collapse an ICElement. Currently, we have to use the projection viewer operations which are not ideal. The Java Editor exposes some methods in its IJavaFoldingStructureProviderExtension: updater.collapseComments(); updater.collapseMembers(); updater.expandElements(IJavaElement[]); etc.