as.patchwork            as.patchwork
gglist                  construct a 'gglist' object
gglistGrob              This function converts 'gglist' object to grob
                        (i.e. gtable object)
insert_left             plot-insertion
plot_list               plot a list of ggplot objects
set_guide_area          set_guide_area
set_guide_layout        set_guide_layout
set_panel_spacing       set_panel_spacing
xlab2                   display x or y axis label as an ordinary text,
                        so that the label will not be aligned with axis
                        label of another plot
xlim2                   xlim2
