get_legend() returning empty grob with ggplot2
3.5.0+ (guide-box naming changed to position-specific names like
“guide-box-right”)@return documentation to all S3 methods
(ggplot_add, print, plot, and ggplotGrob methods)\dontrun{} to \donttest{} in
examples that require suggested packageslegend_keys(): Added detailed documentation
explaining how to use filled shapes (21-25) with different outline/fill
color combinations. Clarified that “colored fill with black outline”
requires mapping both color and fill
aesthetics in the original plot (#1).
Added new example showing correct usage for colored fills with black outlines.