Stacked bars for different length

General Usage
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3 
@df df groupedbar(:name, :duration, group=:label, ylabel="duration",
 bar_width=0.7, legend=:outertopright, bar_position=:stack)

grafik

@df df groupedbar(:label, :duration, group=:name, ylabel="duration",
 bar_width=0.7, legend=:outertopright, bar_position=:stack)

grafik