code: def testRaggedBatchGather(self, descr, params, indices, expected):
      result = ragged_batch_gather_ops.batch_gather(params, indices)
      self.assertAllEqual(result, expected)
  
imports: from absl.testing import parameterized
  from tensorflow.python.eager import context
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops.ragged import ragged_batch_gather_ops
  from tensorflow.python.ops.ragged import ragged_batch_gather_with_default_op
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 1 for calling the RaggedBatchGatherOpTest obj's underlying member method code with example usage: obj.testRaggedBatchGather(descr, params, indices, expected) without return types