I'll agree with you that it is a very "mild" case of magic, or maybe this doesn't qualify as magic at all because Go doc is pretty good. But having to build the

I'll agree with you that it is a very "mild" case of magic, or maybe this doesn't qualify as magic at all because Go doc is pretty good. But having to build the docs and then learning what m.Range does adds extra inconvenience to what until now was just an eyeball scan operation of the "for" line.