Null check operator used on a null value

[Mae623]

Hello, when I use this package, I come across the bug.
When the exception was thrown, this was the stack: #0 _ArrowElementState.initState (package:widget_arrows/widget_arrows.dart:333:73) #1 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:5015:57) #2 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4853:5) #3 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3863:16) #4 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6435:36) #5 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6447:32) ... Normal element mounting (4 frames) #9 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3863:16) #10 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6435:36) #11 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6447:32) ... Normal element mounting (4 frames) #15 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3863:16)

[Schwusch]

Hi, do you have a small example on how to reproduce the exception?