def METHOD_NAME(masquerade_repository: IMasqueradeRepository):
    # Ensure the repository is not empty
    for operating_system in OperatingSystem:
        masque = masquerade_repository.get_masque(operating_system)
        assert isinstance(masque, bytes)
    masquerade_repository.reset()
    for operating_system in OperatingSystem:
        assert masquerade_repository.get_masque(operating_system) is None