Синхронизировал частично с CMS2

src/collection.php

@@ -1,8 +1,7 @@
 <?php
 /**
  * Коллекция
- *
- * package core
+ * 
  */
 class Collection implements ArrayAccess
 {
@@ -40,7 +39,7 @@ class Collection implements ArrayAccess
      *
      * @return void
      */
-    public function set($key, $value)
+    public function set(/*.string.*/$key, /*.any.*/$value)
     {
         $this->data[$key] = $value;
     }
@@ -54,7 +53,7 @@ class Collection implements ArrayAccess
      */
     public function get($key, $default = null)
     {
-        return isset($this->data[$key]) ? $this->data[$key] : $default;
+        return isset($this->data[$key]) && $this->data[$key] != '' ? $this->data[$key] : $default;
     }
 
     public function getInt($key, $default = 0)