protected function processExtensions(array $config, Container $container, $alias)
{
$extensions = !empty($config["extensions"]) ? $config["extensions"] : [];
foreach ($extensions as $service => $extension) {
if (!$container->offsetExists($service)) {
$aliasedService = $this->referenceResolver->aliasThisKey($service, $alias);
if (!$container->offsetExists($aliasedService)) {
throw new ConfigException(sprintf("Cannot use extension for the service '%s' as it does not exist", $service));
}
$service = $aliasedService;
}
foreach ($extension as $i => $call) {
$extension[$i] = $this->processCall($call, $i, $service . " (extension)");
}
if (!empty($extension)) {
$container->extend($service, function ($object) use($extension, $alias) {
return $this->serviceFactory->extendService($object, $extension, $alias);
});
}
}
}
