operator []= method

void operator []=(
  1. int index,
  2. QuadNode<T>? node
)

Implementation

void operator []=(int index, QuadNode<T>? node) {
  if (index < 0 || index >= 4) {
    throw FlutterError('违法参数：只能传入0-3');
  }
  if (node != null) {
    _childMap[index] = node;
  }
}