+std::ostream& operator<<(std::ostream& o, const Vector<FontRun>& fontRuns);
+
+/**
+ * @brief Print a vector of line runs.
+ *
+ * @param [in] o The output stream operator.
+ * @param [in] lineRuns The line runs to print.
+ * @return The output stream operator.
+ */
+std::ostream& operator<<(std::ostream& o, const Vector<LineRun>& lineRuns);