def reactor
      Disclosure.configuration.reactor_classes.select do |rc|
        rc.name == self.reactor_class
      end.first
    end
def reactor
      Disclosure.configuration.reactor_classes.select do |rc|
        rc.name == self.reactor_class
      end.first
    end
Public: Find the reactor class instance from the
 class name (string) that is saved in the model table.

 Returns the reactor class or nil