Grid
<Grid cols=2>
<!-- 2x2 grid of barcharts -->
<BarChart ... />
<BarChart ... />
<BarChart ... />
<BarChart ... />
</Grid>
Options
cols
gapSize
<Grid cols=2>
<!-- 2x2 grid of barcharts -->
<BarChart ... />
<BarChart ... />
<BarChart ... />
<BarChart ... />
</Grid>