svelte/test/validator/samples/action-invalid/warnings.json

[{
	"code": "missing-declaration",
	"message": "'whatever' is not defined. Consider adding a <script> block with 'export let whatever' to declare a prop",
	"pos": 5,
	"start": {
		"line": 1,
		"column": 5,
		"character": 5
	},
	"end": {
		"line": 1,
		"column": 17,
		"character": 17
	}
}]