class_docstr: Integration tests for clustering.
code: def _batch(self, dims, batch_size):
      if dims[0] is None:
          dims[0] = batch_size
      return dims
  
imports: import os
  import tempfile
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow_model_optimization.python.core.clustering.keras import cluster
  from tensorflow_model_optimization.python.core.clustering.keras import cluster_config
  from tensorflow_model_optimization.python.core.clustering.keras.experimental import cluster
label_desc: Use image node_id 4 for calling the ClusterIntegrationTest obj's underlying member method code with example usage: obj._batch(dims, batch_size) and returns: dims