Bug 119603 [api][content assist] allow contributions to filter and sort proposals
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/JavaCompletionProcessor.java
private final static String VISIBILITY= JavaCore.CODEASSIST_VISIBILITY_CHECK;
	private final static String ENABLED= "enabled"; 
	private final static String DISABLED= "disabled"; 
	
	private IContextInformationValidator fValidator;
	private final CompletionProposalComparator fAlphaComparator;
	private final CompletionProposalComparator fComparator;
	protected final IEditorPart fEditor;
	public JavaCompletionProcessor(IEditorPart editor, ContentAssistant assistant, String partition) {
		super(assistant, partition);
		fEditor= editor;
		fAlphaComparator= new CompletionProposalComparator();