packageVersion("ggplot2")
#> [1] '4.0.0'
try(ggplot2::scale_fill_discrete(breaks = 1:2, direction = -1L,))
#> Error in list2(...) : Argument 3 can't be empty.

packageVersion("ggplot2")
#> [1] '3.5.2'
ggplot2::scale_fill_discrete(breaks = 1:2, direction = -1L,)
#> <ggproto object: Class ScaleDiscrete, Scale, gg>
#> aesthetics: fill
#> axis_order: function
#> break_info: function
#> break_positions: function
#> breaks: 1 2
#> call: call
#> clone: function
#> dimension: function
#> drop: TRUE
#> expand: waiver
#> get_breaks: function
#> get_breaks_minor: function
#> get_labels: function
#> get_limits: function
#> get_transformation: function
#> guide: legend
#> is_discrete: function
#> is_empty: function
#> labels: waiver
#> limits: NULL
#> make_sec_title: function
#> make_title: function
#> map: function
#> map_df: function
#> n.breaks.cache: NULL
#> na.translate: TRUE
#> na.value: grey50
#> name: waiver
#> palette: function
#> palette.cache: NULL
#> position: left
#> range: environment
#> rescale: function
#> reset: function
#> train: function
#> train_df: function
#> transform: function
#> transform_df: function
#> super: <ggproto object: Class ScaleDiscrete, Scale, gg>