code: def y(self):
      return self._y
  
file_path: mars/mars/learn/metrics/pairwise/haversine.py
imports: import numpy
  from ....None import opcodes
  from ....core import recursive_tile
  from ....serialization.serializables import KeyField, BoolField
  from ....tensor.core import TensorOrder
  from ....tensor.indexing import fill_diagonal
  from ....tensor.array_utils import as_same_device, device
  from .core import PairwiseDistances
label_desc: Use image node_id 3 for calling the HaversineDistances obj's underlying member method code with example usage: obj.y() and returns: self