Null check is added for PopupChooserBuilder.myItemChosenRunnable:crea…

[cyberspaceru]

Null check is added for PopupChooserBuilder.myItemChosenRunnable:createPopup

When I try to create JBPopup like:

  JBPopupFactory.getInstance()
                .createPopupChooserBuilder(table)
                .setCloseOnEnter(false)
                .createPopup()
                .showInScreenCoordinates(component.getAnchor(), point);

I have to invoke setItemChoosenCallback with a stub to prevent NPE:

  JBPopupFactory.getInstance()
                .createPopupChooserBuilder(table)
                .setItemChoosenCallback(point::toString) // Stub
                .setCloseOnEnter(false)
                .createPopup()
                .showInScreenCoordinates(component.getAnchor(), point);