Repository Management API missing yum proxy

  With recent deprecation of scripting the preferred way to manage repositories is through API. Thank you for making API available, they seem a lot saner than scripting way.

 But, management of YUM proxies is still missing from repo management API. Seems like I can manage any type of repository/group except for yum proxy

Is this just an oversight, or is there a deeper reason why yum proxy is different from anything else?

Thank you!