<array> <dict> <key>Type</key> <string>PSGroupSpecifier</string> <key>Title</key> <string>version</string> </dict> <dict> <key>DefaultValue</key> <string>1.1</string> <key>Key</key> <string>version</string> <key>Title</key> <string>version</string> <key>Type</key> <string>PSTitleValueSpecifier</string> </dict> </array>
I can add readonly the 'Version' variable with the above dictionary in root.plist. Have you installed the use of the Title qualifier? Or try adding the above dict. in your root.plist, this will add a readonly title to your group style settings.
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