<https://lh4.googleusercontent.com/-xvyNZlVamjA/Uk6lZYEAqBI/AAAAAAAAAJQ/LcoXbcyepl4/s1600/Untitled.png>
The API allots (chartArea width / number of potential bar groups) pixel per
bar group, and sets the group width based on that.
The *bar group occupies the entire allotment, even though the bars may be
drawn in a smaller area*; the "spacing" between bar groups is simply the
unused portion of the allotment.
I set the option property in the chartWrapper as bar: {groupWidth: '130%'}
but as you can see in the image, space between the bars is not removed even
if the width of the bar can easily managed.
please help Thanks
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