public void setValueForced(String newValue, long newConfidence) {
            this.confidence = newConfidence;

            if (NULL_VALUE.equals(newValue)) {
                this.value = null;
            } else {
                this.value = newValue;
            }
        }
@return The default value for this field in case we do not know what this is.
analyzer/src/main/java/nl/basjes/parse/useragent/AgentField.java