module-editoruitoolkitcustomization/Editor/Settings/SettingsProvider.cs

using System.Collections.Generic;
using UnityEditor;

namespace Module.UIToolkit.Editor
{
    internal static class SettingsProvider
    {
        [SettingsProvider]
        public static UnityEditor.SettingsProvider GetProvider()
        {
            return new UnityEditor.SettingsProvider("Module/Editor UIToolkit", SettingsScope.User)
            {
                label = "Editor UIToolkit",
                keywords = new List<string> { "UI", "Toolkit" },
                guiHandler = OnGui
            };
        }
        
        private static void OnGui(string searchContext)
        {
            var settings = Settings.Load();
            
            EditorGUI.BeginChangeCheck();
            EditorGUILayout.BeginVertical();

            EditorGUILayout.LabelField("List View", EditorStyles.boldLabel);
            settings.listViewDisableMaxHeight = EditorGUILayout.Toggle("Disable Max Height", settings.listViewDisableMaxHeight);

            EditorGUILayout.EndVertical();

            if (!EditorGUI.EndChangeCheck())
                return;

            settings.Save();
            EditorUIToolkitCustomization.ApplyChanges();
        }
    }
}