module Zeitwerk::RealModName

: (Module) -> String?

a certain class or module of theirs.
with a permanent name, not so much what the user considers to be the name of
because in practice what we really need is the constant paths of modules
We need this indirection becasue the `name` method can be overridden, and

Returns the real name of the class or module.

def real_mod_name(mod)
  UNBOUND_METHOD_MODULE_NAME.bind_call(mod)
end