R Under development (unstable) (2025-07-22 r88445 ucrt) -- "Unsuffered Consequences"
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> library(grid)
> library(gridSVG)

Attaching package: 'gridSVG'

The following objects are masked from 'package:grid':

    linearGradient, pattern, radialGradient

The following object is masked from 'package:grDevices':

    dev.off

> 
> dev.new(width=6, height=6)
dev.new(): using pdf(file="Rplots2.pdf")
> grid.rect(name = "mainrect")
> grid.comment("This is a comment", "mainrect")
> grid.export("comment-test.svg")
Warning message:
In grabDL(warn, wrap, wrap.grobs, ...) :
  one or more grobs overwritten (grab WILL not be faithful; try 'wrap.grobs = TRUE')
> dev.off()
null device 
          1 
> 
> proc.time()
   user  system elapsed 
   0.56    0.07    0.62