code: def testCache(self):
      def fn(dataset, tensor, shape):
          del tensor, shape
          return dataset.cache()
  
      self._testTransformation(fn)
  
imports: import numpy
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import iterator_ops
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import meta_graph
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.grappler import item
  from tensorflow.python.ops import array_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 10 for calling the GrapplerTest obj's underlying member method code with example usage: obj.testCache() and returns: dataset