Generated from protobuf field <code>optional .google.protobuf.FileOptions.OptimizeMode optimize_for = 9 [default = SPEED];</code>
int $var:
$this
public function setOptimizeFor($var) { GPBUtil::checkEnum($var, \Google\Protobuf\Internal\FileOptions\OptimizeMode::class); $this->optimize_for = $var; return $this; }