## E0166: "globals" descriptor "shadowable" property must be a boolean

In a quick-lint-js configuration file, a entry in `"globals"` can have a descriptor object. A descriptor's `"shadowable"` property must be either `true`, `false`, or omitted.

    {
        "globals": {
            "gsap": {
              "shadowable": 0
            }
        }
    }

To fix this error, make the `"shadowable"` property `true` or `false`:

    {
        "globals": {
            "gsap": {
              "shadowable": false
            }
        }
    }

Documentation for other errors