Methods on Properties???

Hello everyone. I am a noob as far as xojo goes. i was studying a few projects examples and i noticed that there are methods on some properties.
Those methods seems to be a little different than regular class methods. how do i replicate them in my project?
Thanks in advance

Those are Computed Properties. You can right-click a property and select “Convert to Computed” for some automagic help, or simply Insert > Computed Property.

much appreciated

More about computed properties here: