code: def add(self, items):
          
          options = self._create_options(items)
          for k, v in options.items():
              if k in self.labels and v not in self.items:
                  options.pop(k)
                  count = 0
                  while f'{k}_{count}' in self.labels:
                      count += 1
                  options[f'{k}_{count}'] = v
          self.widget.options.update(options)
          self.widget.param.trigger('options')
          self.widget.value = list(options.values())[:1]
docs: Add items to options