Bug 26979 Outline pop-up: flicker when filtering
1) open the outline pop-up (ctrl-O) 2) type in a letter ->observe that you can watch how the tree items are removed and then added again. Use of setRedraw(false/true) during filtering should avoid this flickering
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/text/JavaSourceViewerConfiguration.java
* 
	 * @since 2.0
	 */
	public final static String PREFERENCE_TAB_WIDTH= PreferenceConstants.EDITOR_TAB_WIDTH;
	/** 
	 * Preference key for inserting spaces rather than tabs.
	 * 
	 * @since 2.0
	 */
	public final static String SPACES_FOR_TABS= PreferenceConstants.EDITOR_SPACES_FOR_TABS;
	
	private JavaTextTools fJavaTextTools;
	private ITextEditor fTextEditor;
	
	/**
	 * Creates a new Java source viewer configuration for viewers in the given editor 
	 * using the given Java tools.
	 *
	 * @param tools the Java tools to be used
	 * @param editor the editor in which the configured viewer(s) will reside
	 */
	public JavaSourceViewerConfiguration(JavaTextTools tools, ITextEditor editor) {
		fJavaTextTools= tools;
		fTextEditor= editor;
	}
	
	/**
	 * Returns the Java source code scanner for this configuration.
	 *
	 * @return the Java source code scanner