code: def testConcatEmpty(self):
      with test_util.use_gpu():
          t1 = []
          t2 = []
          output = gen_array_ops.concat_v2([t1, t2], 0)
          self.assertFalse(self.evaluate(output))
  
imports: import numpy
  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_impl
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gen_array_ops
  from tensorflow.python.ops import gradient_checker
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import nn_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
label_desc: Use image node_id 32 for calling the ConcatOpTest obj's underlying member method code with example usage: obj.testConcatEmpty() without return types