mui.DoMethod(id, "Remove", listnode$, treenode$)
Listnode$ specifies the node whose list is used to find the entry. The search is started at the beginning of this list. This can be the string identifier of a node or one of the following special values:
Root
Active
Treenode$ specifies the node which is to be removed. If there are children of the node, they are also removed. This can be the string identifier of a node or one of the following special values:
Head
Tail
Active
All