关于spine-core-3.8的问题

readSkeletonData(binary) {

            let scale = this.scale;

            let skeletonData = new spine.SkeletonData();

            skeletonData.name = "";

            let input = new BinaryInput(binary);

            skeletonData.hash = input.readString();

            skeletonData.version = input.readString();

            if ("3.8.75" == skeletonData.version)

                throw new Error("Unsupported skeleton data, please export with a newer version of Spine.");

            skeletonData.x = input.readFloat();

            skeletonData.y = input.readFloat();