Bug 28582 Quickfix icon hides the error icon in editor left ruler [quick fix]
Build 20021216 In presence of problems, one cannot see an error icon in the left ruler, since it get overlapped completely with the quickfix icon. The only error indication is the underlining in the code itself.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitDocumentProvider.java
* Switches the state of problem acceptance according to the value in the preference store.
	 */
	protected void enableHandlingTemporaryProblems() {
		boolean enable= isHandlingTemporaryProblems();
		for (Iterator iter= getConnectedElements(); iter.hasNext();) {
			ElementInfo element= getElementInfo(iter.next());
			if (element instanceof CompilationUnitInfo) {
				CompilationUnitInfo info= (CompilationUnitInfo)element;
				if (info.fModel instanceof IProblemRequestorExtension) {
					IProblemRequestorExtension  extension= (IProblemRequestorExtension) info.fModel;
					extension.setIsActive(enable);
				}
			}
		}
	}
	
	/**
	 * Adds a listener that reports changes from all compilation unit annotation models.
	 */
	public void addGlobalAnnotationModelListener(IAnnotationModelListener listener) {
		fGlobalAnnotationModelListener.addListener(listener);
	}
	/**
	 * Removes the listener.
	 */	
	public void removeGlobalAnnotationModelListener(IAnnotationModelListener listener) {
		fGlobalAnnotationModelListener.removeListener(listener);
	}
	
}