drools-eclipse/org.drools.eclipse/src/main/java/org/drools/eclipse/editors/rete/model/ModelElement.java
protected void firePropertyChange(String property,
                                      Object oldValue,
                                      Object newValue) {
        if ( pcsDelegate.hasListeners( property ) ) {
            pcsDelegate.firePropertyChange( property,
                                            oldValue,
                                            newValue );
        }
    }
protected void firePropertyChange(String property,
                                      Object oldValue,
                                      Object newValue) {
        if ( pcsDelegate.hasListeners( property ) ) {
            pcsDelegate.firePropertyChange( property,
                                            oldValue,
                                            newValue );
        }
    }
Report a property change to registered listeners (for example edit parts).

@param property the programmatic name of the property that changed
@param oldValue the old value of this property
@param newValue the new value of this property