diff --git a/src/Mvc/Model.php b/src/Mvc/Model.php
index ebcebc2..e53607f 100644
--- a/src/Mvc/Model.php
+++ b/src/Mvc/Model.php
@@ -40,6 +40,8 @@
 use Phalcon\Mvc\Model\ValidationFailed;
 use Phalcon\Mvc\ModelInterface;
 use Phalcon\Filter\Validation\ValidationInterface;
+use Phalcon\Support\Collection;
+use Phalcon\Support\Collection\CollectionInterface;
 use Serializable;
 
 /**
@@ -1294,6 +1296,17 @@ public function save(): bool
     {
     }
 
+    /**
+     * Inserted or updates model instance, expects a visited list of objects.
+     *
+     * @param CollectionInterface $visited
+     *
+     * @return bool
+     */
+    public function doSave(\Phalcon\Support\Collection\CollectionInterface $visited): bool
+    {
+    }
+
     /**
      * Serializes the object ignoring connections, services, related objects or
      * static properties
@@ -1673,10 +1686,11 @@ protected function preSave(\Phalcon\Mvc\Model\MetaDataInterface $metaData, bool
      * Saves related records that must be stored prior to save the master record
      *
      * @param ModelInterface[] $related
+     * @param CollectionInterface $visited
      * @return bool
      * @param \Phalcon\Db\Adapter\AdapterInterface $connection
      */
-    protected function preSaveRelatedRecords(\Phalcon\Db\Adapter\AdapterInterface $connection, $related): bool
+    protected function preSaveRelatedRecords(\Phalcon\Db\Adapter\AdapterInterface $connection, $related, \Phalcon\Support\Collection\CollectionInterface $visited): bool
     {
     }
 
@@ -1695,10 +1709,11 @@ protected function postSave(bool $success, bool $exists): bool
      * Save the related records assigned in the has-one/has-many relations
      *
      * @param ModelInterface[] $related
+     * @param CollectionInterface $visited
      * @return bool
      * @param \Phalcon\Db\Adapter\AdapterInterface $connection
      */
-    protected function postSaveRelatedRecords(\Phalcon\Db\Adapter\AdapterInterface $connection, $related): bool
+    protected function postSaveRelatedRecords(\Phalcon\Db\Adapter\AdapterInterface $connection, $related, \Phalcon\Support\Collection\CollectionInterface $visited): bool
     {
     }
 
diff --git a/src/Mvc/Router/Route.php b/src/Mvc/Router/Route.php
index 1614cde..a69e64e 100644
--- a/src/Mvc/Router/Route.php
+++ b/src/Mvc/Router/Route.php
@@ -42,9 +42,9 @@ class Route implements \Phalcon\Mvc\Router\RouteInterface
     protected $hostname = null;
 
     /**
-     * @var string|null
+     * @var string
      */
-    protected $id = null;
+    protected $id = '';
 
     /**
      * @var array|string
@@ -204,9 +204,9 @@ public function getHostname(): ?string
     }
 
     /**
-     * @return string | null
+     * @return string
      */
-    public function getId(): ?string
+    public function getId(): string
     {
     }