code: def test_iterate_nonexistent_prefix(self):
      prefix = ["argh"]
      expected_subpaths = []
  
      self.assertListEqual(
          list(self.structure.iterate_subpaths(prefix)),
          expected_subpaths,
      )
  
imports: import unittest
  import uuid
  from neptune.exceptions import MetadataInconsistency
  from neptune.internal.backends.neptune_backend_mock import NeptuneBackendMock
  from neptune.internal.container_structure import ContainerStructure
  from neptune.internal.container_type import ContainerType
  from neptune.types.value import Value
label_desc: Use image node_id 6 for calling the TestIterateSubpaths obj's underlying member method code with example usage: obj.test_iterate_nonexistent_prefix() without return types