code: def setup(self):
      self.left = Index(np.repeat(np.arange(1000), 100))
      self.right = Index(np.tile(np.arange(500, 1500), 50))
  
imports: import gc
  import numpy
  from pandas import DatetimeIndex, Index, IntervalIndex, MultiIndex, RangeIndex, Series, date_range
  from .pandas_vb_common import setup
label_desc: Use image node_id 1 for calling the UnionWithDuplicates obj's underlying member method code with example usage: obj.setup() without return types