set_section
Description:
Sets or unsets the "section" link of this to section.
The effect of having one menu appear as a section of another is exactly as it sounds: the items from section become a direct part
of the menu that this is added to. See
MenuItem.section for more information about what it means for
a menu item to be a section.
Parameters:
| this |
a MenuItem |
| section |
a MenuModel, or null |