Themes suport - kde-neon

Hi,

I’m using kde-neon and it looks good in my distro (Linuxmint). But I’m wondering if I need to add additional support for gtk-2 and gtk-3? When I expand the extension it shows:

plugs:
  desktop:
    mount-host-font-cache: false
  icon-themes:
    default-provider: gtk-common-themes
    interface: content
    target: $SNAP/data-dir/icons
  kde-frameworks-5-plug:
    content: kde-frameworks-5-core18-all
    default-provider: kde-frameworks-5-core18
    interface: content
    target: $SNAP/kf5
  sound-themes:
    default-provider: gtk-common-themes
    interface: content
    target: $SNAP/data-dir/sounds

Should I also add the following? Or will it create conflicts?

  gtk-2-engines:
    interface: content
    target: $SNAP/lib/gtk-2.0
    default-provider: gtk2-common-themes
  gtk-2-themes:
    interface: content
    target: $SNAP/data-dir/themes
    default-provider: gtk-common-themes
  gtk-3-themes:
    interface: content
    target: $SNAP/data-dir/themes
    default-provider: gtk-common-themes