class InputTransferGroup extends InputGroupBase {
    private String group_id;
    private String new_owner;


    public boolean isValide() {
        if (StringUtil.isNullOrEmpty(group_id) || StringUtil.isNullOrEmpty(operator) || StringUtil.isNullOrEmpty(new_owner))
            return false;
        return true;
    }

    public WFCMessage.TransferGroupRequest toProtoGroupRequest() {<FILL_FUNCTION_BODY>}

    public String getGroup_id() {
        return group_id;
    }

    public void setGroup_id(String group_id) {
        this.group_id = group_id;
    }

    public String getNew_owner() {
        return new_owner;
    }

    public void setNew_owner(String new_owner) {
        this.new_owner = new_owner;
    }
}

        WFCMessage.TransferGroupRequest.Builder groupBuilder = WFCMessage.TransferGroupRequest.newBuilder();

        groupBuilder.setGroupId(group_id);
        groupBuilder.setNewOwner(new_owner);
        if (to_lines != null) {
            for (Integer line : to_lines
            ) {
                groupBuilder.addToLine(line);
            }
        }

        if (notify_message != null) {
            groupBuilder.setNotifyContent(notify_message.toProtoMessageContent());
        }
        return groupBuilder.build();
    
<methods>public non-sealed void <init>() ,public cn.wildfirechat.pojos.MessagePayload getNotify_message() ,public java.lang.String getOperator() ,public List<java.lang.Integer> getTo_lines() ,public void setNotify_message(cn.wildfirechat.pojos.MessagePayload) ,public void setOperator(java.lang.String) ,public void setTo_lines(List<java.lang.Integer>) <variables>public cn.wildfirechat.pojos.MessagePayload notify_message,public java.lang.String operator,public List<java.lang.Integer> to_lines