Get and set the concurrency mode for the current process.
See the entry for Locks for background information on concurrency. Also see “Object Concurrency” in Using Caché Objects.
The concurrency mode determines what type of locking is performed when you access an object.
Includes the following class methods:
Availability: All namespaces.
The special variable $SYSTEM is bound to the %SYSTEM package. This means that (for ObjectScript) instead of
##class(%SYSTEM.class).method(), you can use