Bug 119603 [api][content assist] allow contributions to filter and sort proposals
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/PreferenceConstants.java
/**
	 * A named preference that controls whether targets for of <code>break</code> and <code>continue</code> statements are marked.
	 * Only valid if {@link #EDITOR_MARK_OCCURRENCES} is <code>true</code>.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 * 
	 * @since 3.2
	 */
	public static final String EDITOR_MARK_BREAK_CONTINUE_TARGETS= "markBreakContinueTargets"; 
	
	/**
	 * A named preference that controls whether method exit points are marked.
	 * Only valid if {@link #EDITOR_MARK_OCCURRENCES} is <code>true</code>.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 * 
	 * @since 3.1
	 */
	public static final String EDITOR_MARK_IMPLEMENTORS= "markImplementors"; 
	/**
	 * A named preference prefix for semantic highlighting preferences.
	 * 
	 * @since 3.0
	 */
	public static final String EDITOR_SEMANTIC_HIGHLIGHTING_PREFIX="semanticHighlighting."; 
	/**
	 * A named preference that controls if semantic highlighting is enabled.
	 * <p>