code: def testNestGetTraverseShallowStructure(self):
      func = lambda t: not (isinstance(t, CT) and t.metadata == "B")
      structure = [CT([1, 2], metadata="A"), CT([CT(3)], metadata="B")]
  
      result = nest.get_traverse_shallow_structure(
          func, structure, expand_composites=True
      )
      expected = [CT([True, True], metadata="A"), False]
      self.assertEqual(result, expected)
  
imports: import gc
  import sys
  import weakref
  from absl.testing import parameterized
  import numpy
  from tensorflow.python.framework import composite_tensor
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import indexed_slices
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.framework import type_spec
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.platform import googletest
  from tensorflow.python.util import nest
label_desc: Use image node_id 12 for calling the CompositeTensorTest obj's underlying member method code with example usage: obj.testNestGetTraverseShallowStructure() without return types