Response WIP

framework/yii/web/Response.php

@@ -28,6 +28,21 @@ class Response extends \yii\base\Response
 	 */
 	public $ajaxRedirectCode = 278;
 
+	private $_headers;
+
+	/**
+	 * Returns the header collection.
+	 * The header collection contains the currently registered HTTP headers.
+	 * @return HeaderCollection the header collection
+	 */
+	public function getHeaders()
+	{
+		if ($this->_headers === null) {
+			$this->_headers = new HeaderCollection;
+		}
+		return $this->_headers;
+	}
+
 	/**
 	 * Sends a file to user.
 	 * @param string $fileName file name