Draw legends for All Heatmaps
A list of self-defined legends, should be wrapped into
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.
merge_legends is true in
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.
This function returns no value.
Zuguang Gu <firstname.lastname@example.org>
# There is no example NULL
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