@ReactProp(name = "length", defaultFloat = 1.0f)
    public void setLength(VRTBox box, float length) {
        box.setLength(length);
    }
BoxManager for building a {@link VRTBox}
corresponding to the ViroBox.js control.
android/viro_bridge/src/main/java/com/viromedia/bridge/component/node/control/VRTBoxManager.java