interface ChartAnimationObject
(js) 
currentStep | 
open var currentStep: Number? | 
(js) 
easing | 
abstract var easing: String | 
(js) 
numSteps | 
open var numSteps: Number? | 
(js) 
onAnimationComplete | 
open val onAnimationComplete: ((arg: Any) -> Unit)? | 
(js) 
onAnimationProgress | 
open val onAnimationProgress: ((arg: Any) -> Unit)? | 
(js) 
render | 
open val render: ((arg: Any) -> Unit)? |