src/librariesio/Project.php
public function isAvailable()
    {
        $package = AssetPackage::fromFullName($this->getFullName());

        $repository = Yii::createObject(PackageRepository::class, []);

        return $repository->exists($package);
    }
public function isAvailable()
    {
        $package = AssetPackage::fromFullName($this->getFullName());

        $repository = Yii::createObject(PackageRepository::class, []);

        return $repository->exists($package);
    }
Check the package exists in Asset-Packagist.
@return boolean