{{javascript}}Target : VisualElement
absorber is the Absorber that controls the absorption behaviour of this target.
waiter is the Waiter that controls the waiting behaviour of this target.
leavingSpeed stores the free flow speed an agent has after leaving this target. If set to -1, the free flow
speed is not altered by the waiter.
parallelEvents is the number of events that can be processed in parallel. Hereby meaning specifically the waiting agents.
If AttributesWaiter.individualWaiting is true, and parallelEvents is 0 or less, then an infinite number of agents can be processed.
@author Ludwig Jaeck