addChild method
Add a child at a given position with a widget. Returns the child ID. You need the child size for optimising the focus on child
Implementation
CanvasChildId addChild(
Offset position,
Widget widget, {
Size? childSize,
CanvasChildId? id,
}) {
final childId = _addChildInternal(
position,
widget,
childSize: childSize,
id: id,
);
markDirty();
return childId;
}