scrollChildCount property

int scrollChildCount

The total number of scrollable children that contribute to semantics.

If the number of children are unknown or unbounded, this value will be null.

Implementation 

int get scrollChildCount => _scrollChildCount;
void scrollChildCount= (int value)

Implementation 

set scrollChildCount(int value) {
  if (value == scrollChildCount)
    return;
  _scrollChildCount = value;
  _hasBeenAnnotated = true;
}