code: def test_deduplicate(self):
      self.assertEqual(tf.Variable(0, name="x").name, "x:0")
      with name_scope("name", caller=1):
          with name_scope("name", caller=1):
              self.assertEqual(
                  tf.Variable(0, name="x").name, "name/x:0"
              )
      self.assertEqual(tf.Variable(0, name="x").name, "x:0")
      with name_scope("name"):
          with name_scope("name"):
              self.assertEqual(
                  tf.Variable(0, name="x").name, "name/name/x:0"
              )
  
imports: import tensorflow
  from keras.backend.tensorflow.core import name_scope
  from keras.testing import TestCase
label_desc: Use image node_id 2 for calling the TFNameScopeTest obj's underlying member method code with example usage: obj.test_deduplicate() without return types