public static function descriptor()
{
$descriptor = new \DrSlump\Protobuf\Descriptor(__CLASS__, 'Google.Cloud.Tests.TestLabelsEntry');
$f = new \DrSlump\Protobuf\Field();
$f->number = 1;
$f->name = "key";
$f->type = \DrSlump\Protobuf::TYPE_STRING;
$f->rule = \DrSlump\Protobuf::RULE_OPTIONAL;
$descriptor->addField($f);
$f = new \DrSlump\Protobuf\Field();
$f->number = 2;
$f->name = "value";
$f->type = \DrSlump\Protobuf::TYPE_STRING;
$f->rule = \DrSlump\Protobuf::RULE_OPTIONAL;
$descriptor->addField($f);
return $descriptor;
}