numberOfVisibleDescendants method

int numberOfVisibleDescendants()

Collapsing and expanding - end

Implementation

int numberOfVisibleDescendants() {
  if (this.treeNode.expanded) {
    int sum = this.childControllers.length;
    this.childControllers.forEach((item) {
      sum += item.numberOfVisibleDescendants();
    });
    _numberOfVisibleChildren = sum;
  } else {
    return 0;
  }
  return _numberOfVisibleChildren;
}