public function unfreezeCommand(string $packageKey = 'all')
    {
        if (!$this->bootstrap->getContext()->isDevelopment()) {
            $this->outputLine('Package freezing is only supported in Development context.');
            $this->quit(3);
        }

        $packagesToUnfreeze = [];

        if ($packageKey === 'all') {
            foreach (array_keys($this->packageManager->getAvailablePackages()) as $packageKey) {
                if ($this->packageManager->isPackageFrozen($packageKey)) {
                    $packagesToUnfreeze[] = $packageKey;
                }
            }
            if ($packagesToUnfreeze === []) {
                $this->outputLine('Nothing to do, no packages were frozen.');
                $this->quit(0);
            }
        } else {
            if ($packageKey === null) {
                $this->outputLine('You must specify a package to unfreeze.');
                $this->quit(1);
            }

            if (!$this->packageManager->isPackageAvailable($packageKey)) {
                $this->outputLine('Package "%s" is not available.', [$packageKey]);
                $this->quit(2);
            }
            if (!$this->packageManager->isPackageFrozen($packageKey)) {
                $this->outputLine('Package "%s" was not frozen.', [$packageKey]);
                $this->quit(0);
            }
            $packagesToUnfreeze = [$packageKey];
        }

        foreach ($packagesToUnfreeze as $packageKey) {
            $this->packageManager->unfreezePackage($packageKey);
            $this->outputLine('Unfroze package "%s".', [$packageKey]);
        }
    }