flutter debugger does not stop on breakpoints

Question

every time I want to debug my flutter project the debugger does not stop on the breakpoints like there are no breakpoints even so the uncached exception and all exceptions bottoms in the debugger are working

my

launch.json

file

{
    "version": "0.2.0",
    "configurations": [{
        "name": "Flutter",
        "request": "launch",
        "type": "dart",
        "program": "lib/main.dart",
        "args": [
            "--debug",
            "dev"
        ],
    }]
}

I tried the default launch.json configurations but it's didn't work

{
        "version": "0.2.0",
    "configurations": [
        {
            "name": "Flutter",
            "request": "launch",
            "type": "dart"
        }
    ]
} 

Answer 1

Just import developer package in the intended file import 'dart: developer' as dev;

Then use it as a breakpoint; as we use in javascript

dev.debugger(); // wherever you want to stop