- open filters and uncheck 'blue'. Push on 'GetFilter': filter correctly written as 'excluded'
- open filters again and uncheck 'green' Push on 'GetFilter': now the filter is written as 'members' (even if there are 2 unchecked out of 6 colors)
- if you instead reset the filters and uncheck at once both 'blue' and 'green', the filter is 'excluded'.