src/ConfigLoader.php
final public function loadRequiredConfig(ContainerBuilder $containerBuilder)
    {
        /*/ Make sure required configuration is set /*/
        $configuration = $this->loadedConfigurations($containerBuilder, 'framework');
        if (array_key_exists('secret', $configuration) === false) {
            $containerBuilder->loadFromExtension('framework', ['secret' => 'S0ME_SECR3T']);
        }
    }
final public function loadRequiredConfig(ContainerBuilder $containerBuilder)
    {
        /*/ Make sure required configuration is set /*/
        $configuration = $this->loadedConfigurations($containerBuilder, 'framework');
        if (array_key_exists('secret', $configuration) === false) {
            $containerBuilder->loadFromExtension('framework', ['secret' => 'S0ME_SECR3T']);
        }
    }
@param ContainerBuilder $containerBuilder

@throws \LogicException