+sub _docids_and_maybe_kw ($$) {
+ my ($self, $docids) = @_;
+ return $docids unless wantarray;
+ my $kw = {};
+ for my $num (@$docids) { # likely only 1, unless ContentHash changes
+ # can't use ->search->msg_keywords on uncommitted docs
+ my $idx = $self->{priv_eidx}->idx_shard($num);
+ my $tmp = eval { $idx->ipc_do('get_terms', 'K', $num) };
+ if ($@) { warn "#$num get_terms: $@" }
+ else { @$kw{keys %$tmp} = values(%$tmp) };
+ }
+ ($docids, [ sort keys %$kw ]);
+}
+