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

> 
> pdf(file = NULL)
> 
> pushViewport(viewport())
> grid.rect()
> grid.circle(name = "mycircle")
> grid.text("hello, world!")
> popViewport()
> 
> # All IDs should now be exported with the prefix "TESTPREFIX"
> grid.export("test-prefixes.svg", prefix = "TESTPREFIX")
> dev.off()
null device 
          1 
> 
> proc.time()
   user  system elapsed 
   0.53    0.14    0.60