具有以下图表：
highchart() %>%
hc_chart(type = "waterfall") %>%
hc_yAxis_multiples(create_yaxis(naxis = 2, heights = c(2, 2))) %>%
hc_add_series(data = c(1,3,2), yAxis = 0) %>%
hc_add_series(data = c(20, 40, 10), yAxis = 1)
如何为yAxis = 0添加下钻并为yAxis = 1添加其他下钻？