When I start writing a class that has a dependency injection, I have a clear idea about which services it needs. I generate it -- the plugin, form, controller, or service -- and specify those services.

Then nearly always, unless it's something really very simple, I find that no matter how much I thought about it and planned it, I need to add more services. Maybe remove some too.

Fortunately, because Module Builder saves the configuration of the module code you've generated, it's easy to go back to it and edit it to add more services: