play method
Implementation
void play(List<dynamic> args) {
if (args.length == 1) {
_animationController?.play(args[0]);
} else if (args.length == 2) {
_animationController?.play(args[0], mix: args[1]);
} else if (args.length == 3) {
_animationController?.play(args[0], mix: args[1], mixSeconds: args[2]);
}
}