code: def _setup(
      self,
      k,
      dim,
      batch_shape,
      train_n,
      test_n,
      preferred_nnlib,
      seq_train_n=None,
  ):
      # initialize
      nn_util = NNUtil(
          k=k,
          dim=dim,
          batch_shape=batch_shape,
          preferred_nnlib=preferred_nnlib,
      )
  
      self._run(nn_util, dim, batch_shape, train_n, test_n, seq_train_n)
      return nn_util
  
file_path: gpytorch/test/utils/test_nearest_neighbors.py
imports: import unittest
  import torch
  from gpytorch.utils.nearest_neighbors import NNUtil
label_desc: Use image node_id 1 for calling the TestNNUtil obj's underlying member method code with example usage: obj._setup(k, dim, batch_shape, train_n, test_n, preferred_nnlib, seq_train_n) and returns: nn_util