\name{draw_heatmap_legend-HeatmapList-method}
 \alias{draw_heatmap_legend,HeatmapList-method}

 \alias{draw_heatmap_legend}

 \title{

 Draw legends for All Heatmaps

 }
 \description{

 Draw legends for All Heatmaps

 }
 \usage{

 \S4method{draw_heatmap_legend}{HeatmapList}(object, legend_list = list(), ...)
 }

 \arguments{
 

   \item{object}{A \code{\link{HeatmapList-class}} object.}

   \item{legend_list}{A list of self-defined legends, should be wrapped into \code{\link[grid:grid.grob]{grob}} objects. It is normally constructed by \code{\link{Legend}}.}

   \item{...}{Other arguments.}

 }
 \details{

 Actually we call the "heatmap legends" as the main legends.
 For horizontal heatmap list, the legends are those from heamtap/row annotation/left/right annotation.
 For vertical heatmap list, the legends are those from heamtap/column annotation/top/bottom annotation.
 if \code{merge_legends} is true in \code{\link{draw,HeatmapList-method}}, then it contains all legends shown on the plot.
 

 A viewport is created which contains heatmap legends.

 This function is only for internal use.

 }
 \value{

 This function returns no value.

 }
 \author{

 Zuguang Gu <z.gu@dkfz.de>

 }
 \examples{

 # There is no example

 NULL

 }