add method

void add(
  1. RenderBox child, {
  2. int? flex,
  3. FlexFit? fit,
})

Add a child to the end of the child list

Implementation

void add(RenderBox child, {int? flex, FlexFit? fit}) {
  if (child.parent != this) {
    adoptChild(child);
  }
  _childrenData[child] = FlexChildData(flex: flex, fit: fit);
}