code: def _is_convertible_to_index(other):
      
      if isinstance(other, TimedeltaIndex):
          return True
      elif (len(other) > 0 and
            other.inferred_type not in ('floating', 'mixed-integer', 'integer',
                                        'mixed-integer-float', 'mixed')):
          return True
      return False
docs: return a boolean whether I can attempt conversion to a TimedeltaIndex