Irule - How this Secure Cookie Irule works ?

when HTTP_RESPONSE_RELEASE {
	# Get all values of Set-Cookie headers
	set unsafe_cookie_headers [HTTP::header values "Set-Cookie"]
	# Remove the current unsafe Set-Cookie header
	HTTP::header remove "Set-Cookie"
	foreach set_cookie_header $unsafe_cookie_headers {
		# Insert a new Set-Cookie header with '<value>; Secure' for each one (to securize)
		HTTP::header insert "Set-Cookie" "${set_cookie_header}; Secure"
	}
}