default DigitalActionState getDigitalActionState( String actionName, String restrictToInput ){
        throw new UnsupportedOperationException("Action manifests are not supported for the currently used VR API");
    }
Gets the current state of the action (abstract version of a button press).

This is called for digital style actions (a button is pressed, or not)

This method is commonly called when it is important which hand the action is found on. For example while
holding a weapon a button may be bound to "eject magazine" to allow you to load a new one, but that would only
want to take effect on the hand that is holding the weapon

Note that restrictToInput only restricts, it must still be bound to the input you want to receive the input from in
the action manifest default bindings.

{@link #registerActionManifest} must have been called before using this method.

@param actionName The name of the action. E.g. /actions/main/in/openInventory
@param restrictToInput the input to restrict the action to. E.g. /user/hand/right. Or null, which means "any input"
@return the DigitalActionState that has details on if the state has changed, what the state is etc.
jme3-vr/src/main/java/com/jme3/input/vr/VRInputAPI.java