 Before Changing Source:
(platform layer
  (position 158.00 83.00)
  (bounds 300.00 150.00)
  (children
    (contents layer (model)
      (position 0.00 0.00)
      (bounds 300.00 150.00)
      (model data size 395126)
    )
  )
)
After Changing Source:
(platform layer
  (position 158.00 83.00)
  (bounds 300.00 150.00)
  (children
    (contents layer (model)
      (position 0.00 0.00)
      (bounds 300.00 150.00)
      (model data size 3248)
    )
  )
)