A classifier Behavior property is a property to which the stereotype «ClassifierBehaviorProperty» is applied. The value of a classifier Behavior property is a Behavior simulation of the classifier Behavior of an object. Therefore, the value of the classifier Behavior property exists only after the Behavior of the object has been started (See Executing an Object with Adjunct and Classifier Behavior Properties.). The block Integrator has a classifier Behavior property typed by the activity Integrator. You will see the Behavior simulation as the value of the classifier Behavior in the Variables pane.