code: def testGatherRefVariable(self):
      with self.cached_session():
          v = ref_variable.RefVariable(
              constant_op.constant([[1, 2], [3, 4], [5, 6]])
          )
          self.evaluate(variables.global_variables_initializer())
          gather = array_ops.gather(v, [0, 2])
          self.assertAllEqual([[1, 2], [5, 6]], gather)
  
imports: from absl.testing import parameterized
  import numpy
  from tensorflow.python.eager import backprop
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import indexed_slices
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradient_checker_v2
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import ref_variable
  from tensorflow.python.ops import resource_variable_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
label_desc: Use image node_id 19 for calling the GatherTest obj's underlying member method code with example usage: obj.testGatherRefVariable() without return types