How to add labels to mapview?

Question

This may be an easy question but for some reason can't figure out how to add labels to each region or polygon in my real map. How can I add the NAME_ASCI names to this map?

library(mapview)
library(leaflet)

class(franconia)
  head(franconia)           
 mapview(franconia, alpha.regions = 0.2, aplha = 1)  #Whats the option in mapview to add labels?