Bug 84983 [typing] imports disappear
I20050209-0800 + JDT UI from HEAD 1. open a CU with several imports 2. enable folding (ensure imports are folded) 3. remove code so that first import is no longer needed 4. run Organize Imports ==> all imports are gone 5. close and re-open the editor ==> imports are back
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/folding/DefaultJavaFoldingStructureProvider.java
}
	
	protected boolean isInstalled() {
		return fEditor != null;
	}
		
	/*
	 * @see org.eclipse.jface.text.source.projection.IProjectionListener#projectionEnabled()
	 */
	public void projectionEnabled() {
		
		
		
		
		
		projectionDisabled();
		
		if (fEditor instanceof JavaEditor) {
			initialize();
			fElementListener= new ElementChangedListener();
			JavaCore.addElementChangedListener(fElementListener);
		}
	}
	
	/*
	 * @see org.eclipse.jface.text.source.projection.IProjectionListener#projectionDisabled()
	 */
	public void projectionDisabled() {
		fCachedDocument= null;
		if (fElementListener != null) {