@GET @ApiIgnore // until documented
  @Produces("text/plain")
  public Response getRepositoryVersions(@Context HttpHeaders headers, @Context UriInfo ui) {
    return handleRequest(headers, null, ui, Request.Type.GET, createResource(null));
  }
Gets all repository versions.
Handles: GET /compatible_repository_versions requests.

@param headers http headers
@param ui      uri info
ambari-server/src/main/java/org/apache/ambari/server/api/services/CompatibleRepositoryVersionService.java