[visualization-api] Column Charts- customize legend to display the label of each row

[lakshmi lakkaraju]

Hi Team,

I am working on column charts and have a query on the legend.

var data = google.visualization.arrayToDataTable([
        ['Element', 'Density', *{ role: 'style' }*],
        ['Copper', 8.94, *'#b87333'*],            // RGB value
        ['Silver', 10.49, *'silver'*],            // English color name
        ['Gold', 19.30, *'gold'*],
        ['Platinum', 21.45, *'color: #e5e4e2'* ], // CSS-style declaration
]);

Here, the legend displays 1 item with the name Density. 

I want to customize the legend to display the label of the Element with the 
respective colors used in the row.
So, the legend has to be :
Copper
Silver
Gold
Platinum with 


How can I achieve this.

Thanks,
Lakshmi

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