public synchronized void addPropertyChangeListener(java.beans.PropertyChangeListener listener)
    {
        if (propertyChange == null)
            propertyChange = new java.beans.PropertyChangeSupport(this);
        propertyChange.addPropertyChangeListener(listener);
    }
public synchronized void addPropertyChangeListener ( java . beans . PropertyChangeListener listener ) { if ( propertyChange == null ) propertyChange = new java . beans . PropertyChangeSupport ( this ) ; propertyChange . addPropertyChangeListener ( listener ) ; }
The addPropertyChangeListener method was generated to support the propertyChange field.
@param listener The propery change listener to add to my listeners.