def method_missing(name, *args, &block)
      if respond_to_missing?(name)
        handle_flow_method(name, *args, &block)
      else
        super
      end
    end
def method_missing(name, *args, &block)
      if respond_to_missing?(name)
        handle_flow_method(name, *args, &block)
      else
        super
      end
    end
Public: Initialize a Flow. This object responds to missing
 methods errors and attempts to delegate them to other objects.

 controller - The Controller class where the method was called.
 options    - The options Hash of the Exposure instance being called.
 name       - The String name of the Exposure instance.
 Public: Attempts to re-delegate a method missing to the
 supplied block or the Behavior object.

 name  - The String name of the Exposure instance.
 *args - The arguments given for the missing method.
 block - The Proc invoked by the method.