code: def defaultStorable(self, python_type=None, storable_type=None, version=None, **kwargs):
          
          if python_type is None:
              python_type = lookup_type(storable_type)
          if self.verbose:
              print('generating storable instance for type: {}'.format(python_type))
          self.storables.registerStorable(default_storable(python_type, \
                  version=version, storable_type=storable_type), **kwargs)
          return self.byPythonType(python_type, True).asVersion(version)
docs: Generate a default storable instance.
  
          Arguments:
  
              python_type (type): Python type of the object.
  
              storable_type (str): storable type name.
  
              version (tuple): version number of the storable handler.
  
          Returns:
  
              StorableHandler: storable instance.
  
          Extra keyword arguments are passed to :meth:`registerStorable`.