Add setDocComment() to Node interface

Previously it was only part of NodeAbstract.

Author: nikic

CHANGELOG.md

@@ -3,7 +3,7 @@ Version 3.0.0-dev
 
 ### Added
 
-* Added `NodeAbstract::setDocComment()` method.
+* Added `Node::setDocComment()` method.
 
 Version 3.0.0-beta1 (2016-09-16)
 --------------------------------

lib/PhpParser/Node.php

@@ -41,6 +41,15 @@ public function setLine($line);
      */
     public function getDocComment();
 
+    /**
+     * Sets the doc comment of the node.
+     *
+     * This will either replace an existing doc comment or add it to the comments array.
+     *
+     * @param Comment\Doc $docComment Doc comment to set
+     */
+    public function setDocComment(Comment\Doc $docComment);
+
     /**
      * Sets an attribute on a node.
      *