%<+%                    %<+%
element_blinds          this element is used to control the line color
                        of panel.grid.major/minor.x or
                        panel.grid.major/minor.y
element_roundrect       round rectangle borders and backgrounds
facet_set               facet_set
geom_cake               geom_cake
geom_scatter_rect       geom_scatter_rect
geom_segment_c          geom_segment_c
geom_triangle           geom_triangle
geom_volpoint           geom_volpoint
get_aes_var             get_aes_var
get_legend              get_legend
get_plot_data           get_plot_data
ggbreak2ggplot          ggbreak2ggplot
gglegend                gglegend
identify.gg             identify
is.ggbreak              is.ggbreak
is.ggtree               is.ggtree
keybox                  keybox
set_font                set_font
set_point_legend_shape
                        set_point_legend_shape
td_filter               td-filter
td_mutate               td-mutate
td_unnest               td-unnest
theme_blinds            the theme of blind-like
theme_fp                theme_fp
theme_no_margin         theme_no_margin
theme_nothing           theme_nothing
theme_noxaxis           theme_noxaxis
theme_stamp             the theme of blind-like alias of theme_blinds
theme_transparent       theme_transparent
volplot                 volplot
yrange                  plot range of a ggplot object