This file is indexed.

/usr/lib/fetch-url/floppy is in ubiquity 18.04.14.

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

The actual contents of the file can be viewed below.

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protocol_fetch() {
	local FILE="/media/${1#floppy://*}"

	mountmedia floppy || true
	touch /var/run/preseed-usedfloppy

	if [ ! -e "$FILE" ]; then
		return 4
	elif ! cp "$FILE" $2; then
		return 1
	else
		return 0
	fi
}