from typing import Dict, Any, Optional
from app.visa_free_config_fetchers import get_fetcher

def fetch_visa_free_config(provider: str, origin: str, target: str, visa_type: str, vac: Optional[str] = None) -> Dict[str, Any]:
    fetcher = get_fetcher(provider)
    return fetcher.fetch_free_config(origin=origin, target=target, visa_type=visa_type, vac_code=vac)