## add(self, data, shema_data) {#bytes-bytes}

Adds an item to the collection.


### Returns 





```python

def add(self, data, shema_data):
    ...
```


| Parameter | Type | Description |
| :- | :- | :- |
| data | bytes | The XML content of this Custom XML Data Storage Part. |
| shema_data | bytes | The set of XML schemas that are associated with this custom XML part. |



### See Also
* module [`aspose.cells.markup`](../../)
* class [`CustomXmlPartCollection`](/cells/python-net/aspose.cells.markup/customxmlpartcollection)