class ProgressBar::Throttle

def choke(options = {})
  return unless !timer.started?                        ||
                options.fetch(:force_update_if, false) ||
                timer.elapsed_seconds >= rate
  timer.restart
  yield
end

def initialize(options = {})
  self.rate       = options[:throttle_rate] || 0.01
  self.started_at = nil
  self.stopped_at = nil
  self.timer      = options.fetch(:throttle_timer, Timer.new)
end