fix modelId example
fix modelId example

chyeh727/backbone,akre54/backbone,platinumazure/backbone,craigmichaelmartin/backbone,alekskorolev/lightbones,akre54/backbone,ppker/backbone,jashkenas/backbone,chyeh727/backbone,zgl2007dj/backbone,moimikey/backbone,zgl2007dj/backbone,lastjune/backbone,platinumazure/backbone,moimikey/backbone,ppker/backbone,alekskorolev/lightbones,jridgewell/backbone,jashkenas/backbone,craigmichaelmartin/backbone,lastjune/backbone,darrrk/backbone,darrrk/backbone,jridgewell/backbone