public abstract class MyAbstractAgent extends Agent
                                implements java.io.Serializable {

    private static final long serialVersionUID = 1L;

    /**
     * Constructor in form required for an Agent subclass to be instantiated and for
     * superclass instantiation (as gleaned from looking at Java source of
     * visually-created Agents)
     */
    public MyAbstractAgent(Engine engine,
                           Agent owner,
                           AgentList<? extends MyAbstractAgent> collection) {

        super (engine, owner, collection);

    }

    /*
     * Simple constructor as now included in all AnyLogic 7 generated Agent code. Don't
     * understand when this would be invoked cf. the others so let's assert that we
     * don't think it should
     */
    public MyAbstractAgent() {

        throw new AssertionError("Not expecting simple constructor to be used!");

    }

    // Using package visibility (the default for GUI-designed functions)
    abstract specialAbstractFunction();

}

throw new IllegalStateException("Subclass must implement specialAbstractMethod()");