applications – MPAndroidChart: customize barChart to round bar chart

I'm playing with the MPAndroidChart library, and I want to make a BarChart like this
barChart with rounded corners

but it ends like this

bar graphic

I have read the documentation on Github, and there is someone who requests the drawRoundedBar method, but I can not find that method on mine. So, I try to update the version to 3.0.3 (latest version) and the method does not exist either.
Maybe, some of you have solved this problem before or have another way of solving it.