docs: def create_command_class(name, func_module):
      """Dynamically creates subclass of MigratingCommand.
  
      Method takes name of the function, module it is part of
      and builds the subclass of :py:class:`MigratingCommand`.
      Having a subclass of :py:class:`cliff.command.Command` is mandatory
      for the osc-lib integration.
  
      :param name: name of the function
      :type name: basestring
      :param func_module: the module function is part of
      :type func_module: module
      :return: command name, subclass of :py:class:`MigratingCommand`
      :rtype: tuple(basestring, class)
  
      """
  
      cmd_name = name[3:].replace('_', '-')
      callback = getattr(func_module, name)
      desc = callback.__doc__ or ''
      help = desc.strip().split('\n')[0]
  
      arguments = getattr(callback, 'arguments', [])
  
      body = {
          '_args': arguments,
          '_callback': staticmethod(callback),
          '_description': desc,
          '_epilog': desc,
          '_help': help
      }
  
      claz = type('%sCommand' % cmd_name.title().replace('-', ''),
                  (MigratingCommand,), body)
  
      return cmd_name, claz