Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

//usr/share/glib-2.0/schemas/org.gnome.system.smb.gschema.xml

 <schemalist>
  <schema id="org.gnome.system.smb" path="/org/gnome/system/smb/">
    <key name="workgroup" type="s">
      <default>''</default>
      <summary>SMB workgroup</summary>
      <description>The Windows networking workgroup or domain that the user is part of. In order for a new workgroup to fully take effect the user may need to log out and log back in.</description>
    </key>
  </schema>
</schemalist>