--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface FileLocatorInterface
+{
+ /**
+ * Returns a full path for a given file name.
+ *
+ * @param string $name The file name to locate
+ * @param string|null $currentPath The current path
+ * @param bool $first Whether to return the first occurrence or an array of filenames
+ *
+ * @return string|array The full path to the file or an array of file paths
+ *
+ * @throws \InvalidArgumentException When file is not found
+ */
+ public function locate($name, $currentPath = null, $first = true);
+}