Fix a null safety error in the [SecureGate]

[lubritto]

error: type List<Widget?> is not a subtype of type List in type cast.

<Widget?>[
  widget.child,
  if (_gateVisibility.value != 0)
    Positioned.fill(
      child: BackdropFilter(
        filter: ImageFilter.blur(
            sigmaX: widget.blurr * _gateVisibility.value,
            sigmaY: widget.blurr * _gateVisibility.value),
        child: Container(
          decoration: BoxDecoration(
              color: Colors.grey.shade200
                  .withOpacity(widget.opacity * _gateVisibility.value)),
        ),
      ),
    ),
  if (_lock && widget.lockedBuilder != null)
    widget.lockedBuilder!(context, _secureApplicationController),
] as List<Widget>,

[tsuruobiz]

Same problem. I'm waiting that the PR is merged as soon as possible.

[abhinandval]

#18

had same issue I've made the widget parameter to SecureGate non-null. since the widget is passed to add in a Stack I think it can never be a null-able widget.

[tsuruobiz]

Any update?

[neckaros]

Hello, i merged the other pull request that fix also this issue. Thanks a lot @lubritto !