UMLR — UML 2 has lost cability to represent operations by collaborations

It appears that UML 2 has lost the ability to represent operations by collaborations. (There the collaboration related the parameters of the operation as roles.) Now a collaboration use can only be owned by a classifier. A behavior could still be explained by an operation, but not an operation. If this is desired, the references to operations owning collaboration uses need to be purged. Otherwise it has to be fixed that operations can own collaboration uses.