@Override
    protected Object toJmeObject() {
        // An AnimCurve has no jME3 representation.
        // The parent AnimCurveNode is responsible to create the jME3 
        // representation.
        throw new UnsupportedOperationException("No jME3 object conversion available");
    }
Retrieve the curve value at the given time.
If the curve has no data, 0 is returned.
If the time is outside the curve, then the closest value is returned.
If the time isn't on an exact keyframe, linear interpolation is used
to determine the value between the keyframes at the given time.
@param time The time to get the curve value at (in FBX time units).
@return The value at the given time.
jme3-plugins/src/fbx/java/com/jme3/scene/plugins/fbx/anim/FbxAnimCurve.java