Concurrency Mode (Tools/APIs)
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 Defining and Using Classes.
The concurrency mode determines what type of locking is performed when you access an object.
The special variable $SYSTEM is bound to the %SYSTEM package. This means that instead of ##class(%SYSTEM.class).method(), you can use $SYSTEM.class.method().