Show/Hide Scriptable Object depending on bool value

I want to show/hide some values depending on if a bool variable is set to true or false in the editor. I can do it with an int like this:

Code (CSharp):

1. public class MyScript : MonoBehaviour
2. {
3.    public bool flag;
4.    public int i = 1;
5. }
6. [CustomEditor(typeof(MyScript))]
7. public class MyScriptEditor : Editor
8. {
9.  
10. override public void OnInspectorGUI()
11.    {
12.      var myScript = target as MyScript;
13.      myScript.flag = GUILayout.Toggle(myScript.flag, "Flag");
14.    
15.      if(myScript.flag)
16.        myScript.i = EditorGUILayout.IntSlider("I field:", myScript.i , 1 , 100);
17.    }
18. }

I cannot find the correct EditorGUILayout component to use for a scriptable object. How can I do this?