public T getEntryClamp(int index, T store) {
            index = (int) FastMath.clamp(index, 0, data.getTotalObjectSize() - 1);
            return data.get(index, store);
        }
Obtain the default interpolator for the current thread.

@return the pre-existing instance (not null)
jme3-core/src/main/java/com/jme3/anim/interpolator/FrameInterpolator.java