code: def test_reduce_shape_no_axes_no_keepdims(self):
      input_shape = (1, 4, 4, 1)
      output_shape = operation_utils.reduce_shape(input_shape)
      expected_output_shape = ()
      self.assertEqual(output_shape, expected_output_shape)
  
imports: from keras import backend
  from keras import ops
  from keras import testing
  from keras.layers.core import input_layer
  from keras.ops import operation_utils
label_desc: Use image node_id 14 for calling the OperationUtilsTest obj's underlying member method code with example usage: obj.test_reduce_shape_no_axes_no_keepdims() without return types