How do we print the value of a varible inside the widget?

Question

I would like to print the values of boolean inside the widget Visibility how can I do it ?

Stack(
        children: [
            Scaffold(
                body: Container(
                    //change the margin
                    margin: EdgeInsets.fromLTRB(0, 0, 0, 300),
                    child: 
                    Visibility(
                        visible: mapVisible,

                        // print the value of the boolean mapVisible
                        maintainSemantics: true,
                        maintainInteractivity: true,
                        maintainAnimation: true,
                        maintainState: true,
                        maintainSize: true,
                        replacement: Container(), )

Answer 1

Your question is rather vague. It could be one of 2 things.

1. To print the variable value every time the widget builds you can just move the logic into a method like such.

   bool mapVisible = true;
   Stack(
           children: [
               Scaffold(
                   body: Container(
                       //change the margin
                       margin: EdgeInsets.fromLTRB(0, 0, 0, 300),
                       child: 
                       Visibility(
                           visible: _shouldShow,
   
                           // print the value of the boolean mapVisible
                           maintainSemantics: true,
                           maintainInteractivity: true,
                           maintainAnimation: true,
                           maintainState: true,
                           maintainSize: true,
                           replacement: Container(), )
   bool _shouldShow()
   {
   print(mapVisible);
   return mapVisible;
   }
   

2. or to display the variable as text to the user you can do the following.

   Stack(
           children: [
               Scaffold(
                   body: Container(
                       //change the margin
                       margin: EdgeInsets.fromLTRB(0, 0, 0, 300),
                       child: 
                       Visibility(
                           visible: mapVisible,
   
                           // print the value of the boolean mapVisible
                           maintainSemantics: true,
                           maintainInteractivity: true,
                           maintainAnimation: true,
                           maintainState: true,
                           maintainSize: true,
                           replacement: Container(),
                           child:Text(mapVisible.toString()),//-->show it a widget
    )