protected void setForward(boolean forward) {
        if (this.forward == forward) {
            return;
        }
        this.forward = forward;
        for (Action action : actions) {
            action.setForward(forward);
        }
    }
Adjusts the forward flag which controls the animation action directionality.

@param forward true to run the animation forward, false otherwise.
@see Action#setSpeed(double) to change the directionality of the tween actions, negative numbers play the animation in a backward fashion
jme3-core/src/main/java/com/jme3/anim/tween/action/Action.java