code: def bundle(self, *arguments, **extra):
          
          params = {}
  
          for argument in arguments:
              params.update(argument)
  
          params.update(extra)
          result = {}
          for name, value in params.iteritems():
              if value is None:
                  continue
              segments = name.split('.')
              first = segments[0]
              parameter = self.get_parameter(first)
              if parameter is None:
                  raise RuntimeError("Parameter '%s' not in schema" % name)
              else:
                  if value is None:
                      result[name] = ""
                  else:
                      result[name] = parameter.format(value)
  
          return self._convert_nest_to_flat(result)
docs: Bundle the given arguments in a C{dict} with EC2-style format.
  
          @param arguments: L{Arguments} instances to bundle. Keys in
              later objects will override those in earlier objects.
          @param extra: Any number of additional parameters. These will override
              similarly named arguments in L{arguments}.