code: def dehydrate(self, comp, broker):
          
          if not self.meta_data:
              raise Exception("Hydration meta_path not set. Can't dehydrate.")
  
          if not self.created:
              fs.ensure_path(self.meta_data, mode=0o770)
              if self.data:
                  fs.ensure_path(self.data, mode=0o770)
              self.created = True
  
          c = comp
          doc = None
          try:
              name = dr.get_name(c)
              value = broker.get(c)
              errors = [t for e in broker.exceptions.get(c, [])
                          for t in broker.tracebacks[e]]
              doc = {
                  "name": name,
                  "exec_time": broker.exec_times.get(c),
                  "errors": errors
              }
  
              try:
                  start = time.time()
                  doc["results"] = marshal(value, root=self.data, pool=self.pool)
              except Exception:
                  errors.append(traceback.format_exc())
                  log.debug(traceback.format_exc())
                  doc["results"] = None
              finally:
                  doc["ser_time"] = time.time() - start
          except Exception as ex:
              log.exception(ex)
          else:
              if doc is not None and (doc["results"] or doc["errors"]):
                  try:
                      path = os.path.join(self.meta_data, name + "." + self.ser_name)
                      with open(path, "w") as f:
                          ser.dump(doc, f)
                  except Exception as boom:
                      log.error("Could not serialize %s to %s: %r" % (name, self.ser_name, boom))
                      if path:
                          fs.remove(path)
docs: Saves a component in the given broker to the file system.