- override
Insert the given child into renderObject at the given slot.
The semantics of slot are determined by this element. For example, if
this element has a single child, the slot should always be null. If this
element has a list of children, the previous sibling is a convenient value
for the slot.
Source
@override
void insertChildRenderObject(RenderObject child, dynamic slot) {
assert(slot == _rootChildSlot);
renderObject.child = child;
}