src/Composer/Repository/CompositeRepository.php
public function findPackages($name, $constraint = null)
    {
        $packages = array();
        foreach ($this->repositories as $repository) {
            /* @var $repository RepositoryInterface */
            $packages[] = $repository->findPackages($name, $constraint);
        }

        return $packages ? call_user_func_array('array_merge', $packages) : array();
    }
public function findPackages($name, $constraint = null)
    {
        $packages = array();
        foreach ($this->repositories as $repository) {
            /* @var $repository RepositoryInterface */
            $packages[] = $repository->findPackages($name, $constraint);
        }

        return $packages ? call_user_func_array('array_merge', $packages) : array();
    }
{@inheritdoc}