delete checks from flapjack entity

#!/usr/bin/env ruby
#
#
require 'rubygems'
require 'json'
require 'rest-client'

node = '<FQDN_HERE>'
flaphost = 'http://<FLAPJACK_SERVER_HERE>'

flapjack_status = RestClient.get "#{flaphost}:3081/status/#{node}"
payload = JSON.parse(flapjack_status.body)
payload.each do |check|
  RestClient.delete "#{flaphost}:3080/checks/#{node}/#{check['name']}"
end

Hi
I don't understand what's the meaning of "node = '<FQDN_HERE>'"