This file is indexed.

/etc/acpi/events/lenovo-touchpad is in acpi-support 0.140.

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

The actual contents of the file can be viewed below.

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# /etc/acpi/events/ibmvideobtn
# This is called when the user presses Fn-F8. On ThinkPads this
# toggles the stretching of the display; On LenovoPads this toggles
# the touchpad on and off.

event=ibm/hotkey HKEY 00000080 00001008
action=/etc/acpi/thinkpad-stretchortouchpad.sh