controllerGlobal property
WebViewController
controllerGlobal
latefinal
[late final WebViewController controllerGlobal;[ is declaring a [WebViewController[ variable named [controllerGlobal[ as a final instance variable. The [late[ keyword is used to indicate that the variable will be initialized at a later time, before it is used. This is useful when a variable needs to be declared as final, but its value cannot be determined at the time of declaration. In this case, the [WebViewController[ instance is initialized in the [initState()[ method of the [InAppWebViewState[ class.
Implementation
late final WebViewController controllerGlobal;