+ /**
+ * Handles setting and unsetting the prefix mode.
+ * Finds the given member of the given channel, if it's not found an error message is sent to 'source'
+ * and MODEACTION_DENY is returned. Otherwise the mode change is attempted.
+ * @param source Source of the mode change, an error message is sent to this user if the target is not found
+ * @param dest Unused
+ * @param channel The channel the mode change is happening on
+ * @param param The nickname or uuid of the target user
+ * @param adding True when the mode is being set, false when it is being unset
+ * @return MODEACTION_ALLOW if the change happened, MODEACTION_DENY if no change happened
+ * The latter occurs either when the member cannot be found or when the member already has this prefix set
+ * (when setting) or doesn't have this prefix set (when unsetting).
+ */
+ ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string& param, bool adding);
+
+ /**
+ * Removes this prefix mode from all users on the given channel
+ * @param chan The channel which the server wants to remove your mode from
+ * @param stack The mode stack to add the mode change to
+ */
+ void RemoveMode(Channel* chan, irc::modestacker& stack);
+
+ /**
+ * Mode prefix or 0. If this is defined, you should
+ * also implement GetPrefixRank() to return an integer
+ * value for this mode prefix.
+ */
+ char GetPrefix() const { return prefix; }
+
+ /**
+ * Get the 'value' of this modes prefix.
+ * determines which to display when there are multiple.
+ * The mode with the highest value is ranked first. See the
+ * PrefixModeValue enum and Channel::GetPrefixValue() for
+ * more information.
+ */
+ unsigned int GetPrefixRank() const { return prefixrank; }