def __init__(self, prefix: str, directory: str, fallback_filename: Optional[str]):
    self.prefix = prefix
    self.directory = directory
    self.fallback_filename = fallback_filename
def __init__(self, prefix: str, directory: str, fallback_filename: Optional[str]):
    self.prefix = prefix
    self.directory = directory
    self.fallback_filename = fallback_filename