code: def insert(self, index, option):
          
          option = str(option)
          self._options.insert(index, option)
          # if this is the first option, set it.
          if len(self._options) == 1:
              self.value = option
  
          self._refresh_options()
docs: Insert a new `option` in the Combo at `index`.
  
          :param int option:
              The index of where to insert the option.
  
          :param string option:
              The option to insert into to the Combo.