Answers for "how to remove null safety from flutter"

run flutter no null safety

flutter run --no-sound-null-safety

ignore null safety flutter

"configurations": [
        {
            "name": "Flutter",
            "request": "launch",
            "type": "dart",
            "flutterMode": "debug",
            "args": [
                "--no-sound-null-safety"
            ],
        },
]