Somewhat unfortunate example on void return type on a fetching function

https://github.com/microsoft/TypeScript-Website/blame/0612591abc2d8292c8ddd084b5fb264f203b7026/packages/documentation/copy/en/declaration-files/Do's and Don'ts.md#L81

Sorry if this is overthinking - i am new to typescript.

You are giving a DO example with an interface called "Fetcher" that defines getObject but returning nothing aka void. I think I got the point of "Do write callback parameters as non-optional", but the context is somewhat unfortunate. Maybe there can be thought of a better example for non-optional callback parameters?
Another way to phrase my thought: Is it a DO to use return type void on a getter-Method?

Commencez dans packages/documentation/copy/en/declaration-files/Do's and Don'ts.md, à l’exemple lié autour de la ligne 81. Lisez les indications environnantes sur les paramètres de callback non optionnels et évaluez si l’exemple de Fetcher distingue clairement ce point de la question d’un type de retour void. C’est terminé lorsque l’exemple ou la formulation communique mieux les indications attendues.