The Page class in the hana_ml.visualizers.report_builder module represents a page in a report, which can contain multiple items, and includes methods to add single or multiple items to the page, and to return the configuration data of the page.
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Here is a Python code template based on the provided documentation:

```python
from hana_ml.visualizers.report_builder import Page, Item

# Create a page
page = Page(title="My Page")

# Create an item
item = Item()  # Add parameters as needed

# Add the item to the page
page.addItem(item)

# Create a list of items
items = [Item(), Item()]  # Add parameters as needed

# Add the list of items to the page
page.addItems(items)

# Get the config data of the page
config_data = page.to_json()
``` 

Please replace `Item()` with the actual item instance you want to add to the page. The `Item` class is not defined in the provided documentation, so you need to refer to the `Item` class documentation for the correct usage.