code: def _produceIt(self, segments, thunk):
          
          if not self.prefixURL:
              needle = ()
          else:
              needle = tuple(self.prefixURL.split('/'))
          S = len(needle)
          if segments[:S] == needle:
              if segments == JUST_SLASH:
                  # I *HATE* THE WEB
                  subsegments = segments
              else:
                  subsegments = segments[S:]
              res = thunk()
              # Even though the URL matched up, sometimes we might still
              # decide to not handle this request (eg, some prerequisite
              # for our function is not met by the store).  Allow None
              # to be returned by createResource to indicate this case.
              if res is not None:
                  return res, subsegments
docs: Underlying implmeentation of L{PrefixURLMixin.produceResource} and
          L{PrefixURLMixin.sessionlessProduceResource}.
  
          @param segments: the URL segments to dispatch.
  
          @param thunk: a 0-argument callable which returns an L{IResource}
          provider, or None.
  
          @return: a 2-tuple of C{(resource, remainingSegments)}, or L{None}.