docs: def one_of(*generators):
      """
      Generates an arbitrary value of one of the specified generators.
      This is a class factory, it makes a class which is a closure around the
      specified generators.
      """
  
      class OneOfGenerators(ArbitraryInterface):
          """
          A closure class around the generators specified above, which
          generates one of the generators.
          """
  
          @classmethod
          def arbitrary(cls):
              """
              Generate one of the enclosed generators.
              """
              return arbitrary(random.choice(generators))
  
      OneOfGenerators.__name__ = ''.join([
          'one_of(', ', '.join(generator.__name__ for generator in generators),
          ')'
      ])
      return OneOfGenerators