Timeline - Showing bars of different colors in the same row

[Juan Alberto]

I have a timeline chart with 5 rows, and I have defined the color for each row:

var options = {        
        colors: ['#FFF000', '#0094FF', '#FF6A00', '#26BA00', '#FF0000'],        
        timeline: {            
            colorByRowLabel: true
        }
    };

I would like to know if it is possible to have bars of different colors in the same row.

I would like to combine row 1 and row 2 in one single row (attached image).

Thanks.