Caption on left for a ComboBox (official documentation outdated?)

Hello!

I’m trying to create a CheckBox with a caption on the left and not on the right as default.

When I read the Vaadin documentation (version 7), it’s can be done with the css property “direction: rtl”… but it doesn’t work with the Valo theme.

The link to the sentence in the doc:
https://vaadin.com/docs7/-/part7/framework/components/components-checkbox.html#css-style-rules

“If you want to have the label on the left, you can change the positions with "
direction: rtl
" for the top element.”

Any idea?