public Action action(String name) {
        Action action = actions.get(name);
        if (action == null) {
            action = makeAction(name);
            actions.put(name, action);
        }
        return action;
    }
@param name The name of the action to return.
@return The action registered with specified name. It will make a new
action if there isn't any.
@see #makeAction(java.lang.String)
jme3-core/src/main/java/com/jme3/anim/AnimComposer.java