+ /*! \brief
+ * Stores whether the option was explicitly set.
+ *
+ * \param[in] store Variable to store the flag in.
+ *
+ * The value is set to `false` on creation of the option, and to `true`
+ * as soon as a value is assigned to the option. A default value does
+ * not set the flag to `true`, but assignment that uses
+ * defaultValueIfSet() does.
+ *
+ * The pointer provided should remain valid as long as the associated
+ * Options object exists.
+ */
+ MyClass &storeIsSet(bool *store)
+ { setStoreIsSet(store); return me(); }