@Override
    public String toString() {
        if( value != null ) {
            String valueString = getValueString();
            if( isPrependType() ) {
                return getName() + "-" + valueString;
            }
            return valueString;
        }
        return getName();
    }
Whether the tag should appear in the navigation part of the report
<p>
Is either {@code true} or {@code null}
jgiven-core/src/main/java/com/tngtech/jgiven/report/model/Tag.java