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