[Pharo-project] UITheme builder, change newList list onButtonClick

[J . P . L . Martín]

Hello, I'm having trouble to figure out how to do this, I have a simple
window with 3 buttons, each button should change the content listed on the
list below them but I'm really not sure about how to do it.

This is the code for the window:
---
open
    "Abre la ventana principal del Sistema de Gestion Bibleotecaria"

    | builder contain |
    builder := UITheme builder.
    contain := builder newColumn: {builder newRow: {
            builder newButtonFor: self action: #onPrestamosClick label:
'Prestamos'  help: ''.
            builder newButtonFor: self action: #onMaterialesClick label:
'Materiales'  help: ''.
            builder newButtonFor: self action: #onSociosClick label:
'Socios'  help: ''}.
            builder newColumn: {
            builder newListFor: self list: nil selected: nil
changeSelected: nil  help: '' }.}.

    (contain  openInWindowLabeled: 'Babel') extent: 600@600.
---

How should I define #onLabelClick to set the list to for example: Prestamo
database.

Thanks in advance.