# File lib/fog/virtual_box/models/compute/nat_redirect.rb, line 51
        def save
          requires :nat_engine, :name, :protocol, :host_ip, :host_port, :guest_ip, :guest_port
          with_session do |session|
            raw_network_adapter = session.machine.get_network_adapter(nat_engine.network_adapter.slot)
            raw_nat_engine = raw_network_adapter.nat_driver
            raw_nat_engine.add_redirect(name, protocol, host_ip, host_port, guest_ip, guest_port)
            session.machine.save_settings
          end
          true
        end