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+;;; Code
+(defun wc/conditionally-activate-tabbar ()
+  "Only activate tabbar-mode if the new major-mode is whitelisted."
+  (setq tabbar-whitelist '(prog-mode))
+  (if (memq major-mode tabbar-whitelist)
+      (tabbar-local-mode 1)
+    (tabbar-local-mode nil)))