I had the same fear at first, but actually if you generate dynamically a method name you need to use `#__send__` (and friends) to call it.
Of course `#__send__` supports method_missing: https://github.com/opal/opal/blob/0-6-stable/opal/corelib/ba...
Opal.add_stubs(["first", "second", "to_sym"]);
But lets say I am dynamically generating method using a string passed from user input or server then this would fail.