text: from .assembly_content import AssemblyContentHandler, AssemblyPkgContentTree
  from .assembly_src import AssemblySourceHandler, AssemblySourceCreator, AssemblySourceTree, AssemblyStagedSourceHandler
  
  source_creator = AssemblySourceCreator
  source_handler = AssemblySourceHandler
  content_handler = AssemblyContentHandler
  source_tree = AssemblySourceTree
  staged_source_handler = AssemblyStagedSourceHandler
  package_tree = AssemblyPkgContentTree