ExpressiveInstallerTest\InstallerTestCase::composerHasPackage PHP Method

    private function composerHasPackage($package)
    {
        if (array_key_exists($package, $this->getComposerRequires())) {
            return true;
        }
        if (array_key_exists($package, $this->getComposerDevRequires())) {
            return true;
        }
        return false;
    }