src/Config.php
public function setFinder($finder)
    {
        if (false === \is_array($finder) && false === $finder instanceof \Traversable) {
            throw new \InvalidArgumentException(sprintf(
                'Argument must be an array or a Traversable, got "%s".',
                \is_object($finder) ? \get_class($finder) : \gettype($finder)
            ));
        }

        $this->finder = $finder;

        return $this;
    }
public function setFinder($finder)
    {
        if (false === \is_array($finder) && false === $finder instanceof \Traversable) {
            throw new \InvalidArgumentException(sprintf(
                'Argument must be an array or a Traversable, got "%s".',
                \is_object($finder) ? \get_class($finder) : \gettype($finder)
            ));
        }

        $this->finder = $finder;

        return $this;
    }
{@inheritdoc}