class DismissGroupHandler extends GroupHandler<WFCMessage.DismissGroupRequest> {
    @Override
    public ErrorCode action(ByteBuf ackPayload, String clientID, String fromUser, ProtoConstants.RequestSourceType requestSourceType, WFCMessage.DismissGroupRequest request, Qos1PublishHandler.IMCallback callback) {<FILL_FUNCTION_BODY>}
}

            WFCMessage.GroupInfo groupInfo = m_messagesStore.getGroupInfo(request.getGroupId());
            boolean isAdmin = requestSourceType == ProtoConstants.RequestSourceType.Request_From_Admin;
            ErrorCode errorCode;
            if (groupInfo == null) {
                errorCode = m_messagesStore.dismissGroup(fromUser, request.getGroupId(), isAdmin);
            } else if (isAdmin || (groupInfo.getType() == ProtoConstants.GroupType.GroupType_Normal || groupInfo.getType() == ProtoConstants.GroupType.GroupType_Restricted)
                && groupInfo.getOwner() != null && groupInfo.getOwner().equals(fromUser)) {

                if(request.hasNotifyContent() && request.getNotifyContent().getType() > 0 && requestSourceType == ProtoConstants.RequestSourceType.Request_From_User && !m_messagesStore.isAllowClientCustomGroupNotification()) {
                    return ErrorCode.ERROR_CODE_NOT_RIGHT;
                }

                if(request.hasNotifyContent() && request.getNotifyContent().getType() > 0 && requestSourceType == ProtoConstants.RequestSourceType.Request_From_Robot && !m_messagesStore.isAllowRobotCustomGroupNotification()) {
                    return ErrorCode.ERROR_CODE_NOT_RIGHT;
                }

                if(requestSourceType == ProtoConstants.RequestSourceType.Request_From_User) {
                    int forbiddenClientOperation = m_messagesStore.getGroupForbiddenClientOperation();
                    if((forbiddenClientOperation & ProtoConstants.ForbiddenClientGroupOperationMask.Forbidden_Dismiss_Group) > 0) {
                        return ErrorCode.ERROR_CODE_NOT_RIGHT;
                    }
                }

                //send notify message first, then dismiss group
                if (request.hasNotifyContent() && request.getNotifyContent().getType() > 0) {
                    sendGroupNotification(fromUser, groupInfo.getTargetId(), request.getToLineList(), request.getNotifyContent());
                } else {
                    WFCMessage.MessageContent content = new GroupNotificationBinaryContent(groupInfo.getTargetId(), fromUser, null, "").getDismissGroupNotifyContent();
                    sendGroupNotification(fromUser, request.getGroupId(), request.getToLineList(), content);
                }
                errorCode = m_messagesStore.dismissGroup(fromUser, request.getGroupId(), isAdmin);
            } else {
                errorCode = ErrorCode.ERROR_CODE_NOT_RIGHT;
            }
            return errorCode;
    
<methods>public non-sealed void <init>() <variables>