SingleEventNode

Standalone events unite a node and one particular event.

WARNING: the implementations of equals are really tricky right now. EventImpl is more specific in that VirtualNodeSelector checks if the compared object is another VirtualNodeSelector whose reactor has the same id and whose slot is the same. On the other hand Invariant inherits equals from Reactor which checks for another reactor and then compares their ids.

I don't know if Reactor still needs the equals implementation?