in etl/expiry.py [0:0]
def get_mapped_expiry(expiry, app_name, product_details):
# For Desktop we can map expiry versions to dates.
if app_name == "firefox_desktop":
details = product_details.get(f"{expiry}.0")
if details:
return details
# Other's might be either a date, a version or "never"
if expiry == "never":
return None
else:
return expiry