add gene annotation for Heatmap

[zh-zhang1984]

Thank you for your excellent package for single cell visualization, However I encounter a feature that is not included in the package for plot_heatmap function. Is that possible to added annotation bar for genes (row annotation).

[zh-zhang1984]

I think the returned object of plot_heatmap is a

[1] "HeatmapList"
attr(,"package")
[1] "ComplexHeatmap" 

and thus I want to use the following code to add row annotation:

plot_heatmap(
  dataset = Neutrophil_seurat, 
  markers = BiocMarker$GeneSym,
  sort_var = c("Neutrophil_Type","Condition"),
  anno_var = c("Neutrophil_Type","Condition"),
  anno_colors = list(
    "Set2",# RColorBrewer palette
    c("red","orange","yellow","purple","blue","green"), # color vector
                     "Reds",
    c("blue","white","red"), # Three-color gradient
    "Greens"))+rowAnnotation(BiocFun=rowAnnot)
 Error: The heatmap object should not be processed by draw().

But it reported error. Could you provide some hints to solve the issue?