8 my ($class, $subnamespace) = @_;
10 $singleton_caches->{$subnamespace} = Koha::Cache->new({}, { subnamespace => $subnamespace } ) unless $singleton_caches->{$subnamespace};
11 return $singleton_caches->{$subnamespace};
15 return unless $singleton_caches;
16 for my $cache ( values %$singleton_caches ) {
17 $cache->flush_L1_cache;