我正在学习一些关于 dart 输入的教程，但似乎它只能在终端中运行。不幸的是，我一直得到这个错误**.vscode/launch.json：1：1：错误：应为声明，但得到“|”。{ ^**这是我的launch.json文件中的代码：

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Dart & Flutter",
            "request": "launch",
            "type": "dart",
            "program": ".vscode/launch.json",
            "console": "externalTerminal"   
        }
    ]
}

下面是code --list - extensions的输出：

adelphes.android-dev-ext
Dart-Code.dart-code
Dart-Code.flutter
eamodio.gitlens
esbenp.prettier-vscode
formulahendry.code-runner
jeff-hykin.better-cpp-syntax
ms-azuretools.vscode-docker
ms-vscode-remote.remote-containers
ms-vscode-remote.remote-wsl
ms-vscode.cmake-tools
ms-vscode.cpptools
ms-vscode.cpptools-extension-pack
ms-vscode.cpptools-themes
PKief.material-icon-theme
streetsidesoftware.code-spell-checker
timkmecl.codegpt3
twxs.cmake
VisualStudioExptTeam.vscodeintellicode