| ArborEvent | Persistent callbacks that can also set arguments in ArborEditor | 
| ArborEventUtility | ArborEvent utility class | 
| ParameterList | Parameter list that supports data flow. | 
| PersistentCall | A class that makes persistent member calls by Reflection.            Since it is for Arbor internal processing, if you want to call a member, use the built-in behavior such as ArborEvent class and InvokeMethod. | 
| PersistentGetValue | A class to get the value of a persistent member by Reflection.            Since it is for Arbor internal processing, if you want to get the member value, use the built-in behavior such as GetValueCalculator. |