--- /dev/null
+<?php
+
+namespace Drupal\Driver;
+
+/**
+ * Interface for discovery of sub-drivers.
+ */
+interface SubDriverFinderInterface {
+
+ /**
+ * Returns an array of paths in which to look for Drupal sub-drivers.
+ *
+ * @return array
+ * An array of paths in which to find sub-drivers.
+ */
+ public function getSubDriverPaths();
+
+}