docs: def add_option(self, opt_name, otype, hidden=False):
          """ Add an option to the object
  
          :param opt_name: option name
          :type opt_name: str
          :param otype: option type
          :type otype: subclass of :class:`.GenericType`
          :param hidden: if True the option will be hidden
          :type hidden: bool
          """
          if self.has_option(opt_name):
              raise ValueError("The option is already present !")
          opt = ValueOption.FromType(opt_name, otype)
          opt.hidden = hidden
          self._options[opt_name] = opt