Should output be stored in private or public field

[maciekbanas]

@Cotau I am not sure if we should put output of GitStats in private fields, I mean repos, commits, users.
Still, to show the output, I need to have public functions (show functions - their role is only to reach to private$). I am not sure if it makes sense.
Maybe move it to public? Is there any way to restrict the edition of such public fields?