gschema.xml

<?xml version="1.0" encoding="UTF-8"?>
<schemalist>

  <schema id="org.gtk.Settings.ThemeVariantSwitcher" path="/org/gtk/settings/theme-variant-switcher/">
    <key name="by-class" type="a(sss)">
      <default>[
        ("sublime_text","dark","Sublime Text 3"),
        ("crx_jeogkiiogjbmhklcnbgkdcjoioegiknm","dark","Slack"),
        ("crx_ojcflmmmcfpacggndoaaflkmcoblhnbh","dark","Wunderlist"),
        ("crx_caoihfibgoiiakncomhccbflmlgjaohf","dark","Gistbox"),
        ("crx_nckgahadagoaajjgafhacjanaoiihapd","dark","Google Hangouts"),
        ("crx_boeajhmfdjldchidhphikilcgdacljfm","dark","Facebook"),
        ("Google-chrome","light","Google Chrome"),
        ("Opera beta","dark","Opera Beta"),
        ("sun-awt-X11-XFramePeer","dark","PHPStorm"),
        ("brackets","dark","Brackets")
      ]</default>
      <summary>By WM class</summary>
      <description>List of WM classes to modify.</description>
    </key>
  </schema>

</schemalist>