code: def time_unique(self, dtype_val):
      self.midx.unique()
  
imports: import string
  import numpy
  from pandas import NA, DataFrame, Index, MultiIndex, RangeIndex, Series, array, date_range
  from .pandas_vb_common import setup
label_desc: Use image node_id 2 for calling the Unique obj's underlying member method code with example usage: obj.time_unique(dtype_val) without return types