it is used if you want make persistent (in ~/arcadia/arcadia.pers)
same information
end then reuse them in new startup:
the best way is to use this api :
Arcadia.persistent(_property, _value=nil, _immediate=false)
getter --> Arcadia.persistent(_property)
setter at arcadia exit --> Arcadia.persistent(_property, _value)
setter immediate --> Arcadia.persistent(_property, _value, true)
angal