def __report_maintainer_factory(
days_to_lookup: timedelta) -> BackfillReportMaintainer:
alerts_picker = AlertsPicker(
max_alerts=5,
max_improvements=2,
platforms_of_interest=(
'windows10',
'linux',
'osx',
'android',
'windows7',
), # windows7 lost it's relevance due to lower alert rate on this platform
)
backfill_context_fetcher = IdentifyAlertRetriggerables(
max_data_points=5, time_interval=days_to_lookup)
return BackfillReportMaintainer(alerts_picker, backfill_context_fetcher)
