public static TestScriptableObj ConvertFromString(string str)
    {
        TestScriptableObj obj = new TestScriptableObj();

        string[] strs = str.Split(':');
        obj.testValue = strs[0].GetValue <int>();
        obj.testStr   = strs[1];
        return(obj);
    }
 public static string ConvertToString(TestScriptableObj obj)
 {
     return(obj.testValue + ":" + obj.testStr);
 }