    # File lib/fog/terremark/models/shared/server.rb, line 109
            def shutdown
              requires :id
              begin
                service.power_shutdown(id)
              rescue Excon::Errors::InternalServerError => e
                #Frankly we shouldn't get here ...
                raise e unless e.to_s =~ /because it is already powered off/
              end
              true
            end