Implement geom_GeomDensity2dFill

Contours of 2D density estimates would be very helpful in my Shiny application I'm developing which soon should be published.
We would like to use plotly.

Brief description of the problem:

Warning in geom2trace.default(dots[[1L]][[60L]], dots[[2L]][[1L]], dots[[3L]][[1L]]) :
  geom_GeomDensity2dFilled() has yet to be implemented in plotly.
  If you'd like to see this geom implemented,
  Please open an issue with your example code at
  https://github.com/ropensci/plotly/issues

Create plot with geom_density_2d_filled and this has not yet been implemented.

p <- ggplot(df, aes(Y_cm, X_cm)) + geom_density_2d_filled(contour_var="ndensity") 

Comienza con el ejemplo de R proporcionado usando geom_density_2d_filled(contour_var="ndensity") y rastrea la advertencia desde geom2trace.default. Compara el comportamiento solicitado de densidad rellena con las conversiones de geom existentes en plotly.R; se considera terminado cuando el ejemplo deja de mostrar advertencias y renderiza contornos de densidad 2D rellenos.