A class activates a refinement with `using`. Does calling the refined method through `Object#send` (dynamic dispatch) still work?
module Shout
refine String do
def loud; upcase + "!"; end
end
end
class Greeter
using Shout
def call(s); s.loud; end
def call_send(s); s.send(:loud); end
end
Greeter.new.call("hi")
Greeter.new.call_send("hi")