insertAllItems method
inherited
Insert multiple items at index
and start an animation that will be passed
to AnimatedGrid.itemBuilder or AnimatedList.itemBuilder when the items
are visible.
Implementation
void insertAllItems(int index, int length, { Duration duration = _kDuration }) {
for (int i = 0; i < length; i++) {
insertItem(index + i, duration: duration);
}
}