tests/projects/modbus/modbus_0@modbus/ModbusTCPserver_0@ModbusTCPserver/confnode.xml
SVGHMI: add warning_labels, same as optional_labels but emits warnings at build time if element is missing.
<?xml version='1.0' encoding='utf-8'?>
<ModbusServerNode xmlns:xsd="http://www.w3.org/2001/XMLSchema" Local_Port_Number="1502" Local_IP_Address="127.0.0.1"/>