XmlDriver and "discriminatorMap" for "EmbedMany"

Please correct me if i'm wrong but it looks like that current implementation of XmlDriver does not support the following feature:

"discriminatorMap" for "EmbedMany"

http://www.doctrine-project.org/projects/mongodb_odm/1.0/docs/reference/embedded-mapping/en#mixing-document-types

<?php

class User
{
/**

• @EmbedMany(
• discriminatorMap= { * "download"="DownloadTask", * "build"="BuildTask" * }
• )
  */
  private $tasks = array();
  }

This feature is very important for our project and without it looks like that we have to move to Docblock annotations instead of XML format which could be rather painful and time consuming.