changeSize method
Change the size of the object with the given objectId to the new
width and height.
Implementation
void changeSize(int objectId, {double? width, double? height}) {
if (width == null && height == null) return;
final objects = _objects;
if (objectId < 0 || objectId >= objects.length) return;
final offset = objectId * _objectSize;
if (width != null) objects[offset + 2] = width;
if (height != null) objects[offset + 3] = height;
}