Bug 283551 [FieldAssist] ContentProposalAdapter Class-JavaDoc and Method-JavaDoc contradict each other
The class documentation says: --8<-- This class is not intended to be subclassed. --8<-- But there are methods like openProposalPopup, closeProposalPopup who state something like this: --8<-- This method is used by subclasses to explicitly invoke the opening of the popup. If there are no proposals to show, the popup will not open and a beep will be sounded. --8<-- So did we opened the class since its first release but forgot to update the JavaDoc of the class?
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
System.out
					.println("ContentProposalListener#installControlListener()"); 
		}
		if (controlListener != null) {
			return;
		}
		controlListener = new Listener() {
			public void handleEvent(Event e) {
				if (!isEnabled) {
					return;
				}
				switch (e.type) {
				case SWT.Traverse:
				case SWT.KeyDown:
					if (DEBUG) {
						StringBuffer sb;
						if (e.type == SWT.Traverse) {
							sb = new StringBuffer("Traverse"); 
						} else {
							sb = new StringBuffer("KeyDown"); 
						}
						sb.append(" received by adapter"); 
						dump(sb.toString(), e);
					}
					
					
					if (popup != null) {
						popup.getTargetControlListener().handleEvent(e);
						if (DEBUG) {
							StringBuffer sb;