lib/stateflow.rb in stateflow-0.2.1 vs lib/stateflow.rb in stateflow-0.2.2

@@ -33,9 +33,11 @@
       end
     end
   end
   
   module InstanceMethods
+    attr_accessor :_previous_state
+    
     def current_state  
       @current_state ||= load_from_persistence.nil? ? machine.initial_state : machine.states[load_from_persistence.to_sym]
     end
     
     def current_state=(new_state)