new visitor BindValueCollector both 1st and 2nd level unfold.
new visitor AllValuesCollector.
2nd level unfold of visitor AllValuesCollector.
Adding note to visitor.
remove static keyword from method in PDefinitionListAssistant.
make appropriate changes to places.
removing static keyword from PDefinitionListAssistant,PTraceCoreDefinitionAssistantInterpreter
PTraceDefinitionAssistantInterpreter,SClassDefinitionAssistantInterpreter