init method

void init()

Implementation

void init() {
  if (widget.children != null && widget.children!.isNotEmpty) {
    _generateTabsFromChildren();
  } else if (widget.items != null && widget.items!.isNotEmpty) {
    _generateTabsFromItems();
  }

  _activeKey = widget.activeKey ?? widget.defaultActiveKey;
  // _index = getIndex(_activeKey);
}