old_contents: import argparse
  
  
  def flag_as_value(value):
      class FlagAsInt(argparse.Action):
          def __call__(self, parser, namespace, values, option_string=None):
              setattr(namespace, self.dest, value)
      return FlagAsInt
  
  
  def multi_set(dest1, value1):
      class MultiSet(argparse.Action):
          def __call__(self, parser, namespace, values, option_string=None):
              setattr(namespace, dest1, value1)
              setattr(namespace, self.dest, values)
      return MultiSet
  
new_contents: import argparse
  
  
  def flag_as_value(value):
      class FlagAsValue(argparse.Action):
          def __call__(self, parser, namespace, values, option_string=None):
              setattr(namespace, self.dest, value)
      return FlagAsValue
  
  
  def multi_set(dest1, value1):
      class MultiSet(argparse.Action):
          def __call__(self, parser, namespace, values, option_string=None):
              setattr(namespace, dest1, value1)
              setattr(namespace, self.dest, values)
      return MultiSet
  
subject: Fix action name