class Cucumber::Glue::InvokeInWorld

def self.cucumber_instance_exec_in(world, check_arity, pseudo_method, *args, &block)
  cucumber_run_with_backtrace_filtering(pseudo_method) do
    if check_arity && !cucumber_compatible_arity?(args, block)
      world.instance_exec do
        ari = block.arity
        ari = ari.negative? ? "#{ari.abs - 1}+" : ari
        s1 = ari == 1 ? '' : 's'
        s2 = args.length == 1 ? '' : 's'
        raise ArityMismatchError, "Your block takes #{ari} argument#{s1}, but the Regexp matched #{args.length} argument#{s2}."
      end
    else
      world.instance_exec(*args, &block)
    end
  end
end