--- HttpClientXMLFormatter_origine.inc	2012-03-30 13:10:16.000000000 +0200
+++ HttpClientXMLFormatter.inc	2012-03-30 13:10:23.000000000 +0200
@@ -72,6 +72,16 @@
   }
 
   /**
+   * Return the mime type that the formatter can parse.
+   */
+  public function accepts(){}
+
+  /**
+   * Return the content type form the data the formatter generates.
+   */
+  public function contentType(){}
+
+  /**
    * Unserializes data in the implemented format.
    *
    * @param string $data