protected CompilationUnitContext(ContextType type, String string, int completionPosition,
protected CompilationUnitContext(ContextType type, IDocument document, int completionPosition,
	protected CompilationUnitContext(ContextType type, String string, int completionPosition,		ICompilationUnit compilationUnit)	{		super(type, string, completionPosition);		fCompilationUnit= compilationUnit;	}