code: def remove_die(self, die):
          '''Remove ``Die`` (first matching) from Roll.
          :param die: Die instance
          '''
          if die in self._dice:
              self._dice.remove(dief remove_die(self, die):
          '''Remove ``Die`` (first matching) from Roll.
          :param die: Die instance
          '''
          if die in self._dice:
              self._dice.remove(die)
docs: Remove ``Die`` (first matching) from Roll.
          :param die: Die instance