nl_tokens: Starts the view animation .
pl_tokens: function _initShowAnimation ( item , prevItem , size ) { var spec = item . options . show . animation ? item . options . show . animation . call ( undefined , true , size ) : { } ; item . startSpec = spec ; item . endSpec = { opacity : 1 , transform : Transform . identity } ; item . mod . halt ( ) ; if ( spec . transform ) { item . mod . setTransform ( <mask> . transform ) ; } if ( spec . opacity !== undefined ) { item . mod . setOpacity ( spec . opacity ) ; } if ( spec . align ) { item . mod . setAlign ( spec . align ) ; } if ( spec . origin ) { item . mod . setOrigin ( spec . origin ) ; } var startShowAnimation = _startShowAnimation . bind ( this , item , spec ) ; var waitAndShow = item . wait ? function ( ) { item . wait . then ( startShowAnimation , startShowAnimation ) ; } : startShowAnimation ; if ( prevItem ) { _initTransferableAnimations . call ( this , item , prevItem , waitAndShow ) ; } else { waitAndShow ( ) ; } }