Installer\Bundle\BundleCollection::add PHP Method

    public function add($bundle)
    {
        $this->collection[] = $bundle;
    }

    /**
     * Generate Bundle Collection
     *
     * @param $input
     */
    private function generateBundlesCollection($input, $config)
    {
        $bundles = $config->bundles->installer;
        $bundlesCollection = new BundleCollection();
        $bundlesCollection->add(new Bundle(
                                            $bundles->framework->name,
                                            $bundles->framework->namespace
                                        ));
        $bundlesCollection->add(new Bundle(
                                            $bundles->monolog->name,
                                            $bundles->monolog->namespace
                                        ));
        if ('twig' === $input->getOption('template-engine')) {
            $bundlesCollection->add(new Bundle(
                                                $bundles->twig->name,
                                                $bundles->twig->namespace
                                            ));
        }
        if ($input->getOption('swiftmailer')) {
            $bundlesCollection->add(new Bundle(
                                                $bundles->swiftmailer->name,
                                                $bundles->swiftmailer->namespace
                                            ));
        }
        if ($input->getOption('assetic')) {
            $bundlesCollection->add(new Bundle(
                                                $bundles->assetic->name,
                                                $bundles->assetic->namespace
                                            ));
        }
        if ($input->getOption('orm')) {
            if ('doctrine' === $input->getOption('orm')) {
                $bundlesCollection->add(new Bundle(
                                                    $bundles->doctrine->name,
                                                    $bundles->doctrine->namespace
                                                ));
                if ($input->getOption('doctrine-migration')) {
                    $bundlesCollection->add(new Bundle(
                                                        $bundles->doctrinemigrations->name,
                                                        $bundles->doctrinemigrations->namespace
                                                    ));
                }
                if ($input->getOption('doctrine-fixtures')) {
                    $bundlesCollection->add(new Bundle(
                                                        $bundles->doctrinefixtures->name,
                                                        $bundles->doctrinefixtures->namespace
                                                    ));
                }
            }
            if ('propel' === $input->getOption('orm')) {
                $bundlesCollection->add(new Bundle(
                                                    $bundles->propel->name,
                                                    $bundles->propel->namespace
                                                ));
            }
        }
        if ('mongodb' === $input->getOption('odm')) {
            $bundlesCollection->add(new Bundle(
                                                $bundles->doctrinemongodb->name,
                                                $bundles->doctrinemongodb->namespace
                                            ));
        }

        if ('mandango' === $input->getOption('odm')) {
            $bundlesCollection->add(new Bundle(
                                                $bundles->mandangobundle->name,
                                                $bundles->mandangobundle->namespace
                                            ));
        }

        if ($config_user = $config->bundles->user) {
            $bundlesCollection = $this->addCustomBundlesToCollection($bundlesCollection, $config_user);
        }

        $app = $input->getArgument('app');
        $vendor = $input->getArgument('vendor');
        $bundlesCollection->add(new Bundle($vendor.$app, sprintf('%s\%sBundle', $vendor, $app)));

        return $bundlesCollection;
    }