Add grob in cells

Draw grobs in any cells.

Usage

add_grob(
  plot,
  row = NULL,
  col = NULL,
  part = c("body", "header"),
  order = c("top", "text", "background", "bottom"),
  gb_fn,
  ...
)

plot: A forest plot object.
row: A numeric value or vector indicating row(s) to draw a grob.
col: A numeric value or vector indicating the columns to draw a grob.
part: The grob will be added to "body" (default) or "header".
order: Order in which the grobs should be plotted. Use 'top' (default) to draw the grob above everything, 'text' on the top of text given by plot data but below everything else, 'background' plot on the top of background but below everything else, 'bottom' below everything.
gb_fn: Grob function
...: Other parameters to be passed to gb_fn.

A gtable object.