public void setCurrentAction(String actionName, Action actionToRun) {
        this.setCurrentAction(actionName, actionToRun, true);
    }
Runs the specified Action, starting from time = 0. This cancels any
Action previously running on this layer. By default Action will loop.

@param actionName the Action name or null for no action name
@param actionToRun the Action to run (alias created) or null for no
    action
jme3-core/src/main/java/com/jme3/anim/AnimLayer.java