Class Diagram Example: Element Visibility

/**
 * Attribute and operation visility
 * UML User Guide p. 123
 *
 * @opt operations
 * @opt attributes
 * @opt types
 * @opt visibility
 * @hidden
 */
class UMLOptions {}

/** @hidden */
class Tool {}

class Toolbar {
        protected Tool currentSelection;
        protected Integer toolCount;
        public void pickItem(Integer i) {}
        public void addTool(Tool t) {}
        public void removeTool(Integer i) {}
        public Tool getTool() {}
        protected void checkOrphans() {}
        private void compact() {}
}