Custom Inspector and ExposedRefreces

Hi.

I'm Trying to write my custom inspector, every thing is fine and I can make right field for different type of variables I have in the main script.

But in Main script I have a field which is Exposed Reference

 public ExposedReference<GameObject> relativeToWhat;

How can I make a field for it in OnInspectorGUI ? I tried EditorGUILayout.ObjectField and some other things but I couldn't use them.

By the way if there is no way to do so, Is there any way that I can tell OnInspectorGUI to draw only a specific Part of Default Inspector ? only a specific part of Base.OnInspectorGUI()?

Or if again there Is no way, Is there any way that I can make a gameobject field in custom inspector script and some how handle it in My Main Code ? for example converting or resolving them ? I'm new to exposed References.

And My Main Script doesn't implements Monobehaviour and it is inheriting from TrackAsset Actually I'm creating my own type of playables for timeline.

Here is also put my Custom Editor script up to here Although it is not needed.

Thanks.

 using UnityEditor;
 using UnityEditor.AnimatedValues;
 using UnityEngine;
 
 [CustomEditor(typeof(MagneticTweenTrack))]
 public class MagneticTweenTrackDrawer : Editor
 {
 
     AnimBool animBoolShowUnParentingSettings = new AnimBool(false);
     AnimBool animBoolShowFallowOffset = new AnimBool(true);
     AnimBool animBoolShowRelativeSettings = new AnimBool(false);
 
     public override void OnInspectorGUI()
     {
         MagneticTweenTrack targetTrack = target as MagneticTweenTrack;
         if (targetTrack == null)
             return;
 
         targetTrack.animationClipTrackWillHaveChangesDurringPlayMode = EditorGUILayout.ToggleLeft("Any Change During PlayMode ?", targetTrack.animationClipTrackWillHaveChangesDurringPlayMode);
 
         EditorGUILayout.Space();
         EditorGUILayout.Space();
         EditorGUILayout.HelpBox("Change below values only if you know what are you doing. First read Documentations and then use bellow Parts", MessageType.None, true);
         EditorGUILayout.Space();
 
         EditorGUILayout.LabelField("Parent Mangement Settings", EditorStyles.boldLabel);
 
 
         animBoolShowUnParentingSettings.valueChanged.AddListener(Repaint);
 
         animBoolShowUnParentingSettings.target = EditorGUILayout.ToggleLeft("Use UnParenting ?", targetTrack.useUnParenting);
         targetTrack.useUnParenting = animBoolShowUnParentingSettings.target;
 
         if (EditorGUILayout.BeginFadeGroup(animBoolShowUnParentingSettings.faded))
         {
             EditorGUI.indentLevel++;
             targetTrack.revertToPreviousStatusAfterTimelineFinished = EditorGUILayout.ToggleLeft("Revert to Previous Status ?", targetTrack.revertToPreviousStatusAfterTimelineFinished);
 
             animBoolShowFallowOffset.valueChanged.AddListener(Repaint);
             //entegaMMM
             animBoolShowFallowOffset.target = EditorGUILayout.ToggleLeft("Make Parent to Follow Child ?", targetTrack.inTimelineDurationParentFollowChild);
             targetTrack.inTimelineDurationParentFollowChild = animBoolShowFallowOffset.target;
             if (EditorGUILayout.BeginFadeGroup(animBoolShowFallowOffset.faded))
             {
                 EditorGUI.indentLevel++;
                 EditorGUI.indentLevel++;
                 targetTrack.followOffsetPosition = EditorGUILayout.Vector3Field("Follow Offset Position", targetTrack.followOffsetPosition);
                 targetTrack.followOffsetRotation = EditorGUILayout.Vector3Field("Follow Offset Rotation", targetTrack.followOffsetRotation);
                 EditorGUI.indentLevel--;
                 EditorGUI.indentLevel--;
             }
 
             EditorGUILayout.EndFadeGroup();
             EditorGUI.indentLevel--;
         }
 
         EditorGUILayout.EndFadeGroup();
 
         EditorGUILayout.Space();
         EditorGUILayout.Space();
 
         EditorGUILayout.LabelField("Relative Mode Settings", EditorStyles.boldLabel);
 
         animBoolShowRelativeSettings.valueChanged.AddListener(Repaint);
         animBoolShowRelativeSettings.target = EditorGUILayout.ToggleLeft("Is it Relative ?", targetTrack.isRelative);
         targetTrack.isRelative = animBoolShowRelativeSettings.target;
         if (EditorGUILayout.BeginFadeGroup(animBoolShowRelativeSettings.faded))
         {
             EditorGUI.indentLevel++;
             //
             // Here i am stuck with making a field for my exposed Refrence
          //   targetTrack.relativeToWhat = EditorGUILayout.ObjectField("Relative to what ?",targetTrack.relativeToWhatGameObject, typeof(ExposedReference<GameObject>), true) as ExposedReference<GameObject>;
             
             EditorGUI.indentLevel--;
         }
 
         EditorGUILayout.EndFadeGroup();
 
     }
 }