@Override
    public void read(JmeImporter im) throws IOException {
        InputCapsule ic = im.getCapsule(this);
        start = ic.readInt("start", 0);
        end = ic.readInt("end", 0);
        dirty = ic.readBoolean("dirty", false);
    }
Returns true if this region includes the entire buffer. Can be used for
optimization.

@return
jme3-core/src/main/java/com/jme3/shader/bufferobject/BufferRegion.java