interface Iterable on build

Getting Started
#1

Hello
when i open my project in 2019.r3 i get the following error:

videoplayer.controls.Name Layout (property name) Return type (class Rectangle) does not match overridden method's return type (interface Iterable)

in Versions before 2019.r3 everything is working fine, what does that mean?

#2

changing the name from “controls” to “controlspanel” works. Seems the name “controls” is reserved…

#3

Xojo took over the name Controls to provide a new method to get the iterable set of controls on a layout
See http://documentation.xojo.com/api/deprecated/window.html#window-controls

#4