Basic Batch Tutorial (Script-Fu) on GIMP.org how is it done in GIMP3

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I found this tutorial on gimp.org:
GIMP - GIMP Batch Mode

can someone please tell me how the “simple example” in it is done for GIMP 3?

 (let* ((image (car (gimp-file-load RUN-NONINTERACTIVE filename filename)))
          (drawable (car (gimp-image-get-active-layer image))))
     (plug-in-unsharp-mask RUN-NONINTERACTIVE
                       image drawable radius amount threshold)
     (gimp-file-save RUN-NONINTERACTIVE image drawable filename filename)
     (gimp-image-delete image)))