using opacity-fill should improve sunburst performance
using opacity-fill should improve sunburst performance

bmesuere/uni-test,bmesuere/uni-test,unipept/unipept,bmesuere/uni-test,bmesuere/uni-test,unipept/unipept,unipept/unipept,unipept/unipept,bmesuere/uni-test,unipept/unipept