class Selenium::WebDriver::ActionBuilder

def add_input(device)
  device = Interactions.send(device) if device.is_a?(Symbol) && Interactions.respond_to?(device)
  raise TypeError, "#{device.inspect} is not a valid InputDevice" unless device.is_a?(Interactions::InputDevice)
  unless @async
    max_device = @devices.max { |a, b| a.actions.length <=> b.actions.length }
    pauses(device: device, number: max_device.actions.length) if max_device
  end
  @devices << device
  device
end