improve row grouping

[grt9]

Could row grouping of a table be improved, so that we don't have to manually set groups of different lengths using pack_rows ?

For example, based off a recent table I had to do this:

df %>%
kbl() %>%
kable_classic(full_width = F) %>% 
  pack_rows("A",1,4) %>%
  pack_rows("B",5,6) %>%
  pack_rows("C",7,8) %>%
  pack_rows("D",9,10) %>%
  pack_rows("E",11,12) %>%
  pack_rows("F", 13,14) %>%
  pack_rows("G", 15,16) %>%
  pack_rows("H", 17,18) %>%
  pack_rows("I", 19, 20) %>%
  pack_rows("J",21, 24) %>%
  pack_rows("K", 25, 26) %>%
  pack_rows("L",27, 30) %>%
  pack_rows("M",31, 32) %>%
  pack_rows("N", 33, 34) %>%
  pack_rows("O", 35, 40) %>%
  pack_rows("P", 41, 42) %>%
  pack_rows("Q", 43, 54 )

I know that {gt} uses dplyr::group_by() passed into the table to automatically create row groups. Could the same be implemented here at all?

df %>%
dplyr::group_by(df$col1) %>%
gt()