pocketmine\utils\VersionString::getBuild PHP Method

    public function getBuild()
    {
        return $this->build;
    }

 protected function checkUpdate()
 {
     if ($this->updateInfo === \null) {
         return;
     }
     $currentVersion = new VersionString($this->server->getPocketMineVersion());
     $newVersion = new VersionString($this->updateInfo["version"]);
     if ($currentVersion->compare($newVersion) > 0 and ($currentVersion->get() !== $newVersion->get() or $currentVersion->getBuild() > 0)) {
         $this->hasUpdate = \true;
     } else {
         $this->hasUpdate = \false;
     }
 }