Specify an object and a format to represent it in. Will stop() if no such format is known.
repr(obj, format = "text", ...)The object to create a representation for
The representation format. repr_<format> is then called. (default: Call repr_text)
delegated to the specific repr_<format> function
A character or raw vector of that format or NULL if none is defined.
Only the 'text' format is defined for everything (via print())