public void TestWriteAutoFilter(){
		Assert.IsFalse(sheet.IsAutoFilterLocked());
		sheet.LockAutoFilter();
		Assert.IsFalse(sheet.IsAutoFilterLocked());
		sheet.EnableLocking();
		Assert.IsTrue(sheet.IsAutoFilterLocked());
		sheet.LockAutoFilter(false);
		Assert.IsFalse(sheet.IsAutoFilterLocked());
	}