Neos\Flow\Package\PackageManager::isPackageAvailable PHP Метод

    public function isPackageAvailable($packageKey)
    {
        return $this->getCaseSensitivePackageKey($packageKey) !== false;
    }

 /**
  * @test
  */
 public function deletePackageRemovesPackageFromAvailableAndActivePackagesAndDeletesThePackageDirectory()
 {
     $package = $this->packageManager->createPackage('Acme.YetAnotherTestPackage');
     $packagePath = $package->getPackagePath();
     $this->assertTrue(is_dir($packagePath . PackageInterface::DIRECTORY_CONFIGURATION), 'The package configuration directory does not exist.');
     $this->assertTrue($this->packageManager->isPackageActive('Acme.YetAnotherTestPackage'), 'The package is not active.');
     $this->assertTrue($this->packageManager->isPackageAvailable('Acme.YetAnotherTestPackage'), 'The package is not available.');
     $this->packageManager->deletePackage('Acme.YetAnotherTestPackage');
     $this->assertFalse(is_dir($packagePath . PackageInterface::DIRECTORY_CONFIGURATION), 'The package configuration directory does still exist.');
     $this->assertFalse($this->packageManager->isPackageActive('Acme.YetAnotherTestPackage'), 'The package is still active.');
     $this->assertFalse($this->packageManager->isPackageAvailable('Acme.YetAnotherTestPackage'), 'The package is still available.');
 }