+ /**
+ * @return the next tab page. If the current active tab is the last tab,
+ * it returns the first tab. If there is only one tab, returns nullptr
+ */
+ DolphinTabPage* nextTabPage() const;
+
+ /**
+ * @return the previous tab page. If the current active tab is the first tab,
+ * it returns the last tab. If there is only one tab, returns nullptr
+ */
+ DolphinTabPage* prevTabPage() const;
+