# File lib/fog/rackspace/models/load_balancers/load_balancer.rb, line 100
        def virtual_ips
          if @virtual_ips.nil?
            @virtual_ips = Fog::Rackspace::LoadBalancers::VirtualIps.new({
              :service => service,
              :load_balancer => self})
            @virtual_ips.clear unless persisted?
          end
          @virtual_ips
        end