private void DoPopup(string id, ref ImGuiEx.FilePickerDefinition fpd, Action onDone)
        {
            bool popupOpen = true;

            ImGui.SetNextWindowContentSize(NVector2.One * 400);
            if (ImGui.BeginPopupModal(id, ref popupOpen, ImGuiWindowFlags.NoResize))
            {
                if (ImGuiEx.DoFilePicker(ref fpd))
                {
                    onDone?.Invoke();
                }

                ImGui.EndPopup();
            }
        }