src/vs/workbench/api/common/extHostTypeConverters.ts/pathOrURIToURI
export function pathOrURIToURI(value: string | URI): URI {
	if (typeof value === 'undefined') {
		return value;
	}
	if (typeof value === 'string') {
		return URI.file(value);
	} else {
		return value;
	}
}