VSCode @required snippet

Put it into your keybinding.json (Preferences: Open Keyboard Shortcuts File)

// Place your key bindings in this file to override the defaults
[
  {
    "key": "ctrl+r",
    "command": "editor.action.insertSnippet",
    "when": "editorTextFocus",
    "args": {
      "snippet": "@required "
    }
  }
]