+ /** Get the index in the response parameters for the different data fields
+ *
+ * The fields 'r' (realname) and 'd' (hops) will always be missing in a non-WHOX
+ * query, because WHOX splits them to 2 fields, where old WHO has them as one.
+ *
+ * @param flag The field name to look for
+ * @param out The index will be stored in this value
+ * @return True if the field is available, false otherwise
+ */
+ virtual bool GetFieldIndex(char flag, size_t& out) const = 0;
+