Bug 93287 LTK Core Refactoring triggered on shutdown of JavaPlugin
org.eclipse.ltk.core.refactoring/src/org/eclipse/ltk/internal/core/refactoring/RefactoringCorePlugin.java
private static RefactoringCorePlugin fgDefault;
	
	private static IUndoContext fRefactoringUndoContext;
	
	public RefactoringCorePlugin() {
		fgDefault= this;
	}
	public static RefactoringCorePlugin getDefault() {
		return fgDefault;
	}
	
	public static String getPluginId() {
		return "org.eclipse.ltk.core.refactoring"; 
	}