This file is indexed.

/lib/systemd/system/udev-trigger.service is in udev 175-0ubuntu9.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[Unit]
Description=udev Coldplug all Devices
Wants=udev.service
After=udev-kernel.socket udev-control.socket
DefaultDependencies=no

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/sbin/udevadm trigger --type=subsystems --action=add ; /sbin/udevadm trigger --type=devices --action=add