Makes use of the stored layout information in a forest_plot plot to
create grids of plots.
forest_plot_grid(
  ...,
  nrow = NULL,
  ncol = NULL,
  byrow = TRUE,
  plot_grid_args = list()
)Return value of plot_grid
Pass individual plots returned by forest_plot, or lists of such plots (bare lists will be spliced).
Specify the grid (one is sufficient, uses auto layout if both are null)
If the plots are given in by-row, or by-column (byrow=FALSE) order
Additional arguments to the plot_grid function which is used to create the grid.