question: public void addVetoableChangeListener ( String propertyName , VetoableChangeListener in_vcl ) { beanContextChildSupport . addVetoableChangeListener ( propertyName , in_vcl ) ; }
target:  Method for BeanContextChild interface. Uses the BeanContextChildSupport to add a listener to this object's property. This listener wants to have the right to veto a property change.