@GET @ApiIgnore // until documented
  @Path("{stackVersionId}")
  @Produces("text/plain")
  public Response getHostStackVersion(@Context HttpHeaders headers, @Context UriInfo ui,
      @PathParam("stackVersionId") String stackVersionId) {
    return handleRequest(headers, null, ui, Request.Type.GET, createResource(ui, clusterName, hostName, stackVersionId));
  }
Gets a single host stack version.
Handles: GET /hosts/{hostname}/host_versions/{stackversionid} requests.

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

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