getItemOffset method
Implementation
double? getItemOffset(
int index,
AntdEdge viewportAlign,
AntdEdge itemAlign,
) {
if (effectiveViewportSize == null) return null;
return _itemRegistry.calculateAlignedOffset(
index: index,
viewportAlign: viewportAlign,
itemAlign: itemAlign,
isHorizontal: isHorizontal,
viewportSize: effectiveViewportSize!,
);
}