old_contents: from .cluster import PBS
  from .modules import ScanModule
  from .modules import SessionModule
  from .processors import ScanProcessor
  from .processors import SessionProcessor
  from .task import Task
  from .XnatUtils import SpiderProcessHandler
  
new_contents: from .cluster import PBS
  from .launcher import Launcher
  from .modules import ScanModule
  from .modules import SessionModule
  from .processors import ScanProcessor
  from .processors import SessionProcessor
  from .task import Task
  from .XnatUtils import SpiderProcessHandler
  
subject: Add launcher