A page param is a container for other parameters. See detailed description.
A page param does not hold any relevant value. Rather this is a purely graphical element that is used to gather parameters under a tab. On the graphical interface a PageParam looks like this (e.g. the Controls tab of the panel)
Adds param into the page.
Note that this function cannot be called on pages that are not user parameters (i.e: created either by script or by the “Manage user parameters” user interface)
Once called, you should call
to update the user interface.