[{
	"message": "The 'once' modifier cannot be used in legacy mode",
	"code": "invalid-event-modifier",
	"start": {
		"line": 1,
		"column": 8,
		"character": 8
	},
	"end": {
		"line": 1,
		"column": 37,
		"character": 37
	},
	"pos": 8
}]