+ * @brief Copy assignment operator.
+ *
+ * @SINCE_1_9.26
+ * @param[in] rhs The WheelEvent to copy from
+ * @return A reference to this
+ */
+ WheelEvent& operator=(const WheelEvent& rhs);
+
+ /**
+ * @brief Move assignment operator.
+ *
+ * @SINCE_1_9.26
+ * @param[in] rhs A reference to the moved WheelEvent
+ * @return A reference to this
+ */
+ WheelEvent& operator=(WheelEvent&& rhs) noexcept;
+
+ /**
+ * @brief Checks to see if Shift key modifier has been supplied.