This command checks the existence of an artifact or an aggregated object in the system. It doesn't check any business rules, so it
never throws an application exception (system exceptions like web services connection problems can still occur). If the current user
has an access to the territory specified in objectUri, the command returns true if there is an aggregated object or an artifact with
UESURI objectUri. If false is returned in this case, it is safe to assume the UESURI is not used and it is free to use (Bear in mind
this applies only in the moment of the command call. ). If the current user doesn't have an access to the territory or the territory
doesn't exist, the command always returns false.
Parameters:
objectUri - UESURI of an artifact or an aggregated object