insertRenderObjectChild method
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 element wrapped in an
IndexedSlot is a convenient value for the slot.
Implementation
@override
void insertRenderObjectChild(RenderBox child, ListViewSlot slot) {
assert(child.parent == null);
renderObject.insert(child, index: slot.index);
assert(child.parent == renderObject);
}