old_contents: import Slider from './Slider'
  import Rail from './Rail'
  import Ticks from './Ticks'
  import Tracks from './Tracks'
  import Handles from './Handles'
  
  Slider.Rail = Rail
  Slider.Ticks = Ticks
  Slider.Tracks = Tracks
  Slider.Handles = Handles
  
  export default Slider
  export { Rail, Ticks, Tracks, Handles }
  
new_contents: import Slider from './Slider'
  import Rail from './Rail'
  import Ticks from './Ticks'
  import Tracks from './Tracks'
  import Handles from './Handles'
  
  Slider.Rail = Rail
  Slider.Ticks = Ticks
  Slider.Tracks = Tracks
  Slider.Handles = Handles
  
  export default Slider
  export { Slider, Rail, Ticks, Tracks, Handles }
  
subject: add named export for slider