echarts4r - stacked bar with label for individual segments and total value

I'm trying to make a stacked bar chart in echarts4r that would label both individual segments' values, as well as the total. Here is a short example:

library(echarts4r)

dataset <- data.frame(
  categories = letters[1:5],
  smaller = 11:15,
  larger = 21:25,
  total = 11:15 + 21:25
)

e_charts(dataset, x = categories) %>%
  e_bar(serie = larger, name = "Big", stack = "stack") %>%
  e_bar(serie = smaller, name = "Small", stack = "stack") %>%
  e_labels(position = "inside")

With this, I'm able to get the values of segments labelled as is the goal. However, I can't figure out how to add a label at the end of the bars that would also label the "total" column.

A possible R approach building on the idea of @MatthiasMertens. As in his approach I add a third empty or zero series for the totals but pass the total values via the bind= argument. This way the totals get stored in the name attribute of the data and can be added via the formatter "{b}". Finally, thanks to the comment by @Jan we can set legend=NULL to get rid of the additional series in the legend.

library(echarts4r)

dataset <- data.frame(
  categories = letters[1:5],
  smaller = 11:15,
  larger = 21:25,
  total = 11:15 + 21:25
)
dataset$zero <- 0

e_charts(dataset, x = categories) |>
  e_bar(serie = larger, name = "Big", stack = "stack") |>
  e_bar(serie = smaller, name = "Small", stack = "stack") |>
  e_labels(position = "inside") |>
  e_bar(
    serie = zero, bind = total, name = "Total",
    stack = "stack",
    label = list(
      show = TRUE,
      formatter = "{b}",
      position = "top"
    ),
    legend = NULL
  )