code: def unique(self, level=None):
      # todo handle level with mutliindexer
      self.index_array = ivy.unique_values(self)
      return Index(
          self.index_array,
          dtype=self.dtype,
          copy=self.copy,
          name=self.name,
      )
  
imports: import ivy
  import ivy.functional.frontends.pandas.series
  from typing import Iterable
label_desc: Use image node_id 12 for calling the Index obj's underlying member method code with example usage: obj.unique(level) and returns: Index