1 if vrnode object is valid,
0 if not
x = isvalid(vrnode_object_vector)
| Name of an array of |
This method returns an array that contains 1 when the elements of
vrnode_object_vector are valid vrnode objects, and
0 when they are not.
The vrnode object is considered valid if the following conditions are
met:
The parent world of the node exists.
The parent world of the node is open.
The node with the given vrnode handle exists in the parent
world.