@GET @ApiIgnore // until documented
  @Path("{stackVersionId}")
  @Produces("text/plain")
  public Response getClusterStackVersion(@Context HttpHeaders headers, @Context UriInfo ui,
      @PathParam("stackVersionId") String stackVersionId) {
    return handleRequest(headers, null, ui, Request.Type.GET, createResource(stackVersionId));
  }
Gets a single cluster stack version.
Handles: GET /clusters/{clustername}/stack_versions/{stackVersionId} requests.

@param headers        http headers
@param ui             uri info
@param stackVersionId cluster stack version id

@return information regarding the specific cluster stack version
ambari-server/src/main/java/org/apache/ambari/server/api/services/ClusterStackVersionService.java