Function: Clear all subnav items from a specific nav item.

Function: Retrieve the Toolbar display preference of a user based on context.

Function: Deletes an item from the secondary navigation of the specified component.

Function: Deletes an item from the primary navigation of the specified component.

Function: Check whether a given nav item has subnav items.

Function: Register a screen function, whether or not a related subnav link exists.

Function: For a given subnav item, either hook the screen function or generate redirect arguments, as necessary.

Function: Add an item to secondary navigation of the specified component.

Function: Add a subnav link to the BuddyPress navigation.