<%args>
	$object
	$name => undef
	$SETS => undef
</%args>
<%init>

	return undef unless ref $SETS;
	return undef unless $name;

	my @props = $object->structure();
	my ($prop) = grep { $_->{attr} eq $name } @props;
	return undef	unless ref $prop;

	my @values;
	if ( $prop && ref $prop ) {
		if ( exists $prop->{lookup_opts} && ref $prop->{lookup_opts} eq 'HASH' ) {
			@values = $keeper->get_documents (
					%{$prop->{lookup_opts}},
					names   => 1,
				);
		} elsif ( exists $prop->{values} && ref $prop->{values} eq 'ARRAY' ) {
			@values = @{ $prop->{values} };
		} elsif ( exists $prop->{cases} && ref $prop->{cases} eq 'ARRAY' ) {
			@values = @{ $prop->{cases} };
		}
	}

	return undef	unless @values;

	my @ids;
	foreach my $val ( @values ) {
		if ( ref $val eq 'ARRAY' && scalar @$val == 2 ) {
			if ( exists $SETS->{$name."_".$val->[0]} && $SETS->{$name."_".$val->[0]} ) {
				push @ids, $val->[0];
			}
		} else {
			if ( exists $SETS->{$name."_".$val} && $SETS->{$name."_".$val} ) {
				push @ids, $val;
			}
		}
	}
	return \@ids;

</%init>