private void Start()
    {
        if (React.Script.ScriptSource == ReactUnity.ScriptSource.File &&
            !File.Exists(React.Script.SourcePath))
        {
            var newPath = SelectFileDialog.Open();

            if (newPath == null)
            {
                return;
            }

            React.Script.SourcePath = newPath;
        }

        React.enabled = true;
    }