old_contents: """Package API
  """
  
  from .ladder import URL, API, urlpathjoin, flatten, iterflatten
  
  from .__meta__ import (
      __title__,
      __summary__,
      __url__,
      __version__,
      __author__,
      __email__,
      __license__
  )
  
  __all__ = ['URL', 'API', 'urlpathjoin', 'flatten', 'iterflatten']
  
new_contents: """Package API
  """
  
  from .ladder import (
      Ladder)
  from .urlpath import (
      URLPath)
  from .ospath import (
      OSPath)
  from .delimitedpath import (
      DelimitedPath)
  from .api import (
      API)
  from .utils import (
      delimitedpathjoin,
      ospathjoin,
      urlpathjoin,
      flatten,
      iterflatten)
  
  from .__meta__ import (
      __title__,
      __summary__,
      __url__,
      __version__,
      __author__,
      __email__,
      __license__)
  
  __all__ = [
      'Ladder',
      'URLPath',
      'OSPath',
      'DelimitedPath',
      'API',
      'ospathjoin',
      'delimitedpathjoin',
      'urlpathjoin',
      'flatten',
      'iterflatten']
  
subject: Update library api.