code: def testInvalidFlattenFromError(self):
      with self.assertRaisesRegex(ValueError, "preserve_dims"):
          reshape.Flatten(preserve_dims=0)
  
imports: from absl.testing import parameterized
  import numpy
  from sonnet.src import reshape
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 7 for calling the FlattenTest obj's underlying member method code with example usage: obj.testInvalidFlattenFromError() without return types