search for: overallline

Hi, I would like to use the beanplot() function from the beanplot package. Unfortunately, I can't find out how to suppress the dashed horizontal line, that shows the overall mean. In the help I've found the argument "overallline", but it only allows for "mean" or "median" . I have tried overallline = F, overallline="n", and overallline="", but without success. Strangely, I could also not find any suggestions on the internet. Does anybody know how to do this? Thanks, Samue...