## BuiltInDocumentPropertyCollection::IsNull method


Checks whether the implementation object is nullptr.

```cpp
bool Aspose::Cells::Properties::BuiltInDocumentPropertyCollection::IsNull() const
```


## ReturnValue

Returns true if the implementation object is nullptr. Otherwise, returns false

## See Also

* Class [BuiltInDocumentPropertyCollection](../)
* Namespace [Aspose::Cells::Properties](../../)
* Library [Aspose.Cells for C++](../../../)