unique dlgrob names?

[tdhock]

if there is a ggplot with more than one geom_dl, and they get the same grob name "dlgrob" then only the first will be drawn. I was expecting both should be drawn regardless of name.
Putting browser inside of drawDetails.dlgrob we see that it gets the same data (from the first geom) in both cases.
TODO create MRE.
is this an issue with grid or ggplot2?

[tdhock]

fixed in #27, this was a directlabels issue, grid documentation says that all grobs in a gTree must have unique names.