Sculpin\Contrib\ProxySourceCollection\ProxySourceCollectionDataProvider::beforeRun PHP Method

    public function beforeRun(SourceSetEvent $sourceSetEvent)
    {
        foreach ($sourceSetEvent->updatedSources() as $source) {
            if ($source->isGenerated()) {
                // We want to skip generated sources in case someone is
                // doing something like a redirect where virtual sources are
                // created like a redirect plugin.
                //
                // NOTE: This means that a generator cannot create proxy
                // source collection items. This could be limiting in the
                // future...
                continue;
            }
            if ($this->filter->match($source)) {
                $this->map->process($source);
                $this->collection[$source->sourceId()] = $this->factory->createProxySourceItem($source);
            }
        }
        $foundAtLeastOne = false;
        foreach ($sourceSetEvent->allSources() as $source) {
            if ($this->filter->match($source)) {
                $foundAtLeastOne = true;
                break;
            }
        }
        if (!$foundAtLeastOne) {
            echo 'Didn\'t find at least one of this type : ' . $this->dataProviderName . PHP_EOL;
        }
        $this->collection->init();
    }