void setDataRecordCallback(DataRecordCallbackFunction *f) { dataRecordCallbackFunction = f;
void setDataRecordCallback(IpfixReceiver* ipfixReceiver, DataRecordCallbackFunction* f) { ipfixReceiver->dataRecordCallbackFunction = f;
void setDataRecordCallback(DataRecordCallbackFunction *f) {	dataRecordCallbackFunction = f;	}