Design Time: DatagridView Colums does not display the property provided by the extender

Just as simple as that. The Test property is attached to controls, ListView columns, anything I want except for Columns (in Columns Collection Editor of a DataGridView). Why? Is there something I can do?

[ProvideProperty("Test", typeof(IComponent))]
        public partial class Component1 : Component, IExtenderProvider
        {
            private Dictionary<string, string> _commponentsIntlist = new Dictionary<string, string>();
 
            [Browsable(true)]
            [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
            public Dictionary<string, string> ComponentsAndStatefullProp
            {
                get { return _commponentsIntlist; }
                set { _commponentsIntlist = value; }
            }
            
            public Component1()
            {
                InitializeComponent();
            }
 
            public Component1(IContainer container)
            {
                container.Add(this);
                InitializeComponent();
            }
 
            bool System.ComponentModel.IExtenderProvider.CanExtend(object obj)
            {
                if (obj.GetType() == typeof(Component1)) return false;
                if (obj is IComponent) return true;
                return false;
            }
 
            public string GetTest(IComponent component)
            {
                if (!_commponentsIntlist.ContainsKey(component.ToString()))
                {
                    _commponentsIntlist.Add(component.ToString(), "");
                }
                return (string)_commponentsIntlist[component.ToString()];
            }
 
            public void SetTest(IComponent component, string value)
            {
                if (!_commponentsIntlist.ContainsKey(component.ToString()))
                {
                    _commponentsIntlist.Add(component.ToString(), value);
                }
                else
                    _commponentsIntlist[component.ToString()] = value;
            }
        }

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