Bug 31473 Search Engine should not search in working copies that aren't on the build path
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/JavaUI.java
public static final String ID_PLUGIN= "org.eclipse.jdt.ui"; 
	
	/**
	 * The id of the Java perspective
	 * (value <code>"org.eclipse.jdt.ui.JavaPerspective"</code>).
	 */	
	public static final String ID_PERSPECTIVE= 		"org.eclipse.jdt.ui.JavaPerspective"; 
	
	/**
	 * The id of the Java hierarchy perspective
	 * (value <code>"org.eclipse.jdt.ui.JavaHierarchyPerspective"</code>).
	 */	
	public static final String ID_HIERARCHYPERSPECTIVE= "org.eclipse.jdt.ui.JavaHierarchyPerspective"; 
	/**
	 * The id of the Java action set
	 * (value <code>"org.eclipse.jdt.ui.JavaActionSet"</code>).
	 */
	public static final String ID_ACTION_SET= "org.eclipse.jdt.ui.JavaActionSet"; 
	/**
	 * The id of the Java Element Creation action set
	 * (value <code>"org.eclipse.jdt.ui.JavaElementCreationActionSet"</code>).
	 * 
	 * @since 2.0
	 */
	public static final String ID_ELEMENT_CREATION_ACTION_SET= "org.eclipse.jdt.ui.JavaElementCreationActionSet"; 
	
	/**
	 * The id of the Java Coding action set
	 * (value <code>"org.eclipse.jdt.ui.CodingActionSet"</code>).
	 *