def item_at_with_index(self,index: int) -> ItemAtWithIndexRequestBuilder:
        """
        Provides operations to call the itemAt method.
        param index: Usage: index={index}
        Returns: ItemAtWithIndexRequestBuilder
        """
        if index is None:
            raise TypeError("index cannot be null.")
        from .item_at_with_index.item_at_with_index_request_builder import ItemAtWithIndexRequestBuilder

        return ItemAtWithIndexRequestBuilder(self.request_adapter, self.path_parameters, index)

        Provides operations to call the itemAt method.
        param index: Usage: index={index}
        Returns: ItemAtWithIndexRequestBuilder
        
msgraph/generated/drives/item/items/item/workbook/worksheets/item/charts/charts_request_builder.py