ExpressiveInstallerTest\InstallerTestCase::composerDefinitionHasPackage PHP Method

    private function composerDefinitionHasPackage($package)
    {
        $definition = $this->getComposerDefinition();
        if (array_key_exists($package, $definition['require'])) {
            return true;
        }
        if (array_key_exists($package, $definition['require-dev'])) {
            return true;
        }
        return false;
    }