old_contents: from pyservice.client import Client
  from pyservice.service import Service
  
  __all__ = ["Client", "Service"]
  
new_contents: from pyservice.client import Client
  from pyservice.layer import Layer
  from pyservice.operation import Operation
  from pyservice.service import Service
  
  __all__ = ["Client", "Layer", "Operation", "Service"]
  
subject: Reorder __all__