Optimize QueryResult and QueryResultInterface stubs

* Add null as possible return type for QueryResult::getFirst()
* Add annotations for \ArrayAccess and \Iterator

Author: sascha-egerer

stubs/QueryResult.stub

@@ -1,13 +1,16 @@
 <?php
 namespace TYPO3\CMS\Extbase\Persistence\Generic;
 
+use TYPO3\CMS\Extbase\Persistence\QueryResultInterface;
+
 /**
  * @template ModelType
+ * @implements QueryResultInterface<ModelType>
  */
-class QueryResult
+class QueryResult implements QueryResultInterface
 {
     /**
-     * @return ModelType
+     * @return null|ModelType
      */
     public function getFirst();
 }

stubs/QueryResultInterface.stub

@@ -3,11 +3,18 @@ namespace TYPO3\CMS\Extbase\Persistence;
 
 /**
  * @template ModelType
+ * @extends \ArrayAccess<string, ModelType>
+ * @extends \Iterator<string, ModelType>
  */
-interface QueryResultInterface
+interface QueryResultInterface extends \Countable, \Iterator, \ArrayAccess
 {
     /**
-     * @return ModelType
+     * @return null|ModelType
      */
     public function getFirst();
+
+    /**
+     * @return ModelType[]
+     */
+    public function toArray();
 }