Hides the children of a ListBrowser node. It will only hide the next generation, nodes of higher generations will not be modified.
Note that as with any modifications to a ListBrowser list, the list must NOT be attached to the listbrowser at the time of modification.
INPUTS
node
the node whose children you will be hiding. The node must NOT be in a list that that is currently attached to a ListBrowser. Safe to call with a NULL pointer.