How can I split my Click commands, each with a set of sub-commands, into multiple files?

[grundic]

Here is the link to the stackoverflow. I'm not the original author of this question, but I have the same problem, so decided to ask here.
Could you please help with it if it's ever possible?
The only possible solution I know is loading subcommands dynamically like in complex example, but I thought maybe there could be better solution.
Thank you.

[untitaker]

It is considered rude to crosspost questions in the bugtracker, especially if they already have answers.