PhpBrew\Version::getMajorVersion PHP Method

    public function getMajorVersion()
    {
        return $this->majorVersion;
    }

 private function isDistributedAtMuseum($version)
 {
     $version = new Version($version);
     if ($version->getMajorVersion() > 5) {
         return false;
     }
     if ($version->getMinorVersion() > 4) {
         return false;
     }
     if ($version->getMinorVersion() === 4) {
         return $version->getPatchVersion() <= 21;
     }
     return true;
 }