}
private static void updateRanges(JsonObject frame, long startTime,
double scaleFactor) {
scaleRange(frame.get("range").asObject(), startTime, scaleFactor);
final JsonArray children = frame.get("children").asArray();
for (int i = 0, n = children.getLength(); i < n; ++i) {
updateRanges(children.get(i).asObject(), startTime, scaleFactor);
}
}