old_contents: from catpy.applications.base import CatmaidClientApplication
  from catpy.applications.export import ExportWidget
  from catpy.applications.nameresolver import NameResolver
  
  __all__ = ["CatmaidClientApplication", "ExportWidget", "NameResolver"]
  
new_contents: from catpy.applications.base import CatmaidClientApplication
  from catpy.applications.export import ExportWidget
  from catpy.applications.nameresolver import NameResolver
  from catpy.applications.relation_identifier import RelationIdentifier
  
  __all__ = ["CatmaidClientApplication", "ExportWidget", "NameResolver", "RelationIdentifier"]
  
subject: add relationidentifier to imports