Get Image Data
# S3 method for class 'SlideSeq'
GetImage(object, mode = c("grob", "raster", "plotly", "raw"), ...)
# S3 method for class 'STARmap'
GetImage(object, mode = c("grob", "raster", "plotly", "raw"), ...)
# S3 method for class 'VisiumV1'
GetImage(object, mode = c("grob", "raster", "plotly", "raw"), ...)
# S3 method for class 'VisiumV2'
GetImage(object, mode = c("grob", "raster", "plotly", "raw"), ...)