Add a magic-y helper to the service resource.
Add a magic-y helper to the service resource.

This mirrors a similar helper for ruby, but isn't actually that complex.
Still nice for symmetry and possibly future expansion.
noradaiko/application_python,noradaiko/application_python,chenliu0831/application_python,chenliu0831/application_python,poise/application_python,poise/application_python,h4ck3rm1k3/application_python,janusnic/application_python,janusnic/application_python,h4ck3rm1k3/application_python