Bug 63898 [reconciling] Multiple threads calling IJavaReconcilingListener#reconciled() at the same time
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
}
		
		/*
		 * @see ITextOperationTarget#canDoOperation(int)
		 */
		public boolean canDoOperation(int operation) {
			if (operation == CORRECTIONASSIST_PROPOSALS)
				return isEditable();
			
			return super.canDoOperation(operation);
		}
		
		/*
		 * @see org.eclipse.jface.text.source.ISourceViewerExtension2#unconfigure()
		 * @since 3.0
		 */
		public void unconfigure() {
			if (fCorrectionAssistant != null) {
				fCorrectionAssistant.uninstall();
				fCorrectionAssistant= null;
			}
			super.unconfigure();
		}
		
		public void insertTextConverter(ITextConverter textConverter, int index) {
			throw new UnsupportedOperationException();
		}
		
		public void addTextConverter(ITextConverter textConverter) {
			if (fTextConverters == null) {