Add getOrderable

Author: Torann

src/Repositories/AbstractRepository.php

@@ -343,6 +343,16 @@ public function getSearchable()
         return $this->searchable;
     }
 
+    /**
+     * Return orderable array.
+     *
+     * @return array
+     */
+    public function getOrderable()
+    {
+        return $this->orderable;
+    }
+
     /**
      * Filter results by given query params.
      *