dev/label/growfs_swap

Hi,

The swap "utility" /dev/label/growfs_swap is new.

The system was installed by writing 
FreeBSD-15.0-CURRENT-arm64-aarch64-RPI-20240104-8bf0882e186e-267378.img
to the hd from another freebsd system then plugging it into the usb3
port of the rpi4.

Where can I read about it? it's not in the man page for
growfs.

# man growfs_swap
No manual entry for "growfs_swap"

# gpart show
=       63  1953525105  da0  MBR  (932G)
         63        1985       - free -  (993K)
       2048      102400    1  fat32lba  [active]  (50M)
     104448  1953420720    2  freebsd  (931G)

=>         0  1953420720  da0s2  BSD  (931G)
            0         128         - free -  (64K)
          128  1936637824      1  freebsd-ufs  (923G)
   1936637952    16777216      2  freebsd-swap  (8.0G)
   1953415168        5552         - free -  (2.7M)

# cat /etc/fstab
# Custom /etc/fstab for FreeBSD embedded images
/dev/ufs/rootfs         /               ufs     rw,noatime,async                1       1
/dev/msdosfs/EFI                /boot/efi       msdosfs rw,noatime      0       0
tmpfs                   /tmp            tmpfs   rw,mode=1777    0       0
/dev/label/growfs_swap  none            swap    sw              0       0

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