- * @param $policy Mixed, returns empty array on null/false/'', transparent
- * to already-converted arrays, converts String.
- * @return Array: 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
+ * @param array|string $policy Returns empty array on null/false/'', transparent
+ * to already-converted arrays, converts string.
+ * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>