old_contents: from .file_importer import FileImporter
  from .importer import Importer
  from .linked_data import LinkedData
  from .local_file_adapter import LocalFileAdapter
  
new_contents: from .file_importer import FileImporter
  from .importer import Importer
  from .importer_utils import repair, replace_with_byte
  from .linked_data import LinkedData
  from .local_file_adapter import LocalFileAdapter
  
subject: add utils