Add legend title to e_visual_map

[lepromatous]

It doesn't appear possible to add a legend title to a piecewise e_visual_map, even by inspecting the HTML/JS to manually hack and throw in some text. Am I missing something? Is it possible to add an option in e_visual_map so you could add a title to the legend?

not reprex but example code:

.dat |>
e_charts_(df_link) |>
e_map_register("mapz", map_json) |>
e_map(serie = var_int,
map = "mapz",
nameProperty = map_link,
aspectScale = 1) |>
e_visual_map(
type = "piecewise",
pieces = piecez) |> ...

[where piecez contains min/max/labels/etc of all items required by the pieces argument]