code: public void onChange(String oldValue, String value)
      {
          if (TriggerableProperties.equals(oldValue, value)) {
              return;
          }
  
          triggerList.execute(this, value);
      }
docs: Called when a property's value has just changed.
  
  <p>If one of the triggers on the property throws a {@link
  org.eigenbase.util.property.Trigger.VetoRT} exception, this method passes
  it on.
  
  @param oldValue Previous value of the property
  @param value New value of the property
  
  @throws org.eigenbase.util.property.Trigger.VetoRT if one of the triggers
  threw a VetoRT