CPAN::Groonga

 @values = grep $_->is_resource, $self->rdf_get(@_);
	wantarray ? @values : $values[0];
}

sub TO_JSON
{
	my $self = shift;
	$self->fixes if $self->can('fixes');
	my $hash = +{ %$self };
	delete $hash

, $self->meta->calculate_all_roles_with_inheritance ];
	return $hash;
}

sub dump_json
{
	require JSON;
	JSON::to_json(
		shift(),
		{ pretty => 1, canonical => 1, convert_blessed => 1 },
	);
}

sub i