/**
* Updates the runtimes list to most recent version.
*/
private void buildRuntimeTree() {
updateRuntime();
Runtime rootInfo = findRuntime();
root = new RuntimeNode();
root.setFrameName("_top");
root.setRuntimeID(rootInfo.getRuntimeID());
List<Runtime> runtimeInfos = Lists.newArrayList(runtimesList.values());
runtimeInfos.remove(rootInfo);
for (Runtime runtimeInfo : runtimeInfos) {