handle aes( ... = NULL) appropriately

ggplotly does not accept aesthetics with NULL assignment.
Use case in a programmatic big app I have a code that assigns aesthetics globally then turn off the aesthetics for some layers.
There are some workarounds but my issue I am filing in here is to handle correctly the aes ( ... = NULL)

require(ggplot2)
require(plotly)

plottest<- ggplot(mtcars,aes(mpg,disp))+
  aes(group=cyl)+
  geom_line()+
  geom_smooth(aes(group=NULL))

ggplotly(plottest)

plotfixed<- ggplot(mtcars,aes(mpg,disp))+
  geom_line(aes(group=cyl) )+
  geom_smooth()

ggplotly(plotfixed)

Inizia eseguendo gli esempi R forniti con ggplot2 e plotly, confrontando l’estetica globale del gruppo con il layer che usa aes(group=NULL). Traccia il modo in cui ggplotly gestisce quel layer e verifica che l’assegnazione di NULL disabiliti l’estetica ereditata senza interrompere la conversione.