///
LoadStatus loadStatus = LoadStatus.loading;
///
LoadStatusView(status: loadStatus,
    errorCall: _retry,
    child: const Center(
      child: Text('content'),
    ),
)
/// init load data
_loadData() {
    _setStatus(LoadStatus.loading);
        Future.delayed(Duration(seconds: 2), () {
        _setStatus(LoadStatus.success);
    });
}
///
_retry() {
  _loadData();
}
///
_setStatus(LoadStatus status) {
    setState(() {
      loadStatus = status;
    });
}