How can I enable/disable a script or a method in a script from another editorwindow script ?

In the editorwindow script I have a toggle gui :

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
 using UnityEditor;
 using UnityEngine;
 
 public class CompareObjects : EditorWindow
 {
     bool enabledisable = false;
 
     [MenuItem("Tools/Hierarchy Editor")]
     public static void ShowWindow()
     {
         GetWindow<CompareObjects>("CompareObjects");
     }
     private void OnGUI()
     {
         CustomHierarchy.gameObjectFontColor = EditorGUILayout.ColorField("Original Font Color", CustomHierarchy.gameObjectFontColor);
         CustomHierarchy.prefabOrgFontColor = EditorGUILayout.ColorField("Prefab Original Font Color", CustomHierarchy.prefabOrgFontColor);
         CustomHierarchy.prefabModFontColor = EditorGUILayout.ColorField("Prefab Modified Font Color", CustomHierarchy.prefabModFontColor);
         CustomHierarchy.inActiveColor = EditorGUILayout.ColorField("Inactive Color", CustomHierarchy.inActiveColor);
 
         enabledisable = EditorGUILayout.Toggle("Enable", enabledisable);
         if (enabledisable)
             if (GUILayout.Button("Disable"))
             {
                 
             }
     }
 }
 

And with this toggle I want to enable/disable the CustomHierarchy script : Either to disable the whole CustomHierarchy script as component or only the method name CustomHierarchy :

 using System.Linq;
 using UnityEditor;
 using UnityEngine;
 //Adapted from Unity3DCollege YouTube Video Tutorial https://www.youtube.com/watch?v=pdDrY8Mc2lU
 [InitializeOnLoad]
 public class CustomHierarchy : MonoBehaviour
 {
     private static Vector2 offset = new Vector2(0, 2);
     public static Color gameObjectFontColor = Color.black;
     public static Color prefabOrgFontColor = Color.black;
     public static Color prefabModFontColor = Color.white;
     public static Color inActiveColor = new Color(0.01f, 0.4f, 0.25f);
     public static Color containsBoxColliderColor = Color.yellow;
     
     static CustomHierarchy()
     {
             EditorApplication.hierarchyWindowItemOnGUI += HandleHierarchyWindowItemOnGUI;
     }
 
     private static void HandleHierarchyWindowItemOnGUI(int instanceID, Rect selectionRect)
     {
         Color fontColor = gameObjectFontColor;
         Color backgroundColor = new Color(.76f, .76f, .76f);
         FontStyle styleFont = FontStyle.Normal;
         var obj = EditorUtility.InstanceIDToObject(instanceID);
         GameObject gameObj = EditorUtility.InstanceIDToObject(instanceID) as GameObject;
         if (Selection.instanceIDs.Contains(instanceID))
         {
             backgroundColor = new Color(0.24f, 0.48f, 0.90f);
         }
         if (obj != null)
         {
             var prefabType = PrefabUtility.GetPrefabType(obj);
             if (gameObj.activeInHierarchy == false)
             {
                 backgroundColor = inActiveColor;
             }
 
             if (gameObj.GetComponent<BoxCollider>() != null)
             {
                 backgroundColor = containsBoxColliderColor;
             }
 
             if (prefabType == PrefabType.PrefabInstance)
             {
                 styleFont = FontStyle.Bold;
                 PropertyModification[] prefabMods = PrefabUtility.GetPropertyModifications(obj);
                 foreach (PropertyModification prefabMod in prefabMods)
                 {
                     if (prefabMod.propertyPath.ToString() != "m_Name" && prefabMod.propertyPath.ToString() != "m_LocalPosition.x" && prefabMod.propertyPath.ToString() != "m_LocalPosition.y" && prefabMod.propertyPath.ToString() != "m_LocalPosition.z" && prefabMod.propertyPath.ToString() != "m_LocalRotation.x" && prefabMod.propertyPath.ToString() != "m_LocalRotation.y" && prefabMod.propertyPath.ToString() != "m_LocalRotation.z" && prefabMod.propertyPath.ToString() != "m_LocalRotation.w" && prefabMod.propertyPath.ToString() != "m_RootOrder" && prefabMod.propertyPath.ToString() != "m_IsActive")
                     {
                         fontColor = prefabModFontColor;
                         break;
                     }
                 }
                 if (fontColor != prefabModFontColor) fontColor = prefabOrgFontColor;
             }
             Rect offsetRect = new Rect(selectionRect.position + offset, selectionRect.size);
             EditorGUI.DrawRect(selectionRect, backgroundColor);
             EditorGUI.LabelField(offsetRect, obj.name, new GUIStyle()
             {
                 normal = new GUIStyleState() { textColor = fontColor },
                 fontStyle = styleFont
             }
             );
         }
     }
 }
 

I'm not sure what's more logic to disable/enable only this line :

 EditorApplication.hierarchyWindowItemOnGUI += HandleHierarchyWindowItemOnGUI;

Or to disable/enable the whole CustomHierarchy script. But the idea is stop the CustomHierarchy from being doing the line :

 EditorApplication.hierarchyWindowItemOnGUI += HandleHierarchyWindowItemOnGUI;