Constant PER_QUERY_GATHER_ACTIVE_JOBS_FNS 

pub(crate) const PER_QUERY_GATHER_ACTIVE_JOBS_FNS: &[for<'tcx> fn(_: TyCtxt<'tcx>, _: &mut QueryMap<'tcx>, require_complete: bool) -> Option<()>];

Used by collect_active_jobs_from_all_queries to iterate over all queries, and gather the active jobs for each query.

(We arbitrarily use the word “gather” when collecting the jobs for each individual query, so that we have distinct function names to grep for.)