code: def fix_aggs(self):
          
          aggs = self.aggs
          for key in list(aggs.keys()):
              _type = aggs[key].get("_type", "unknown")
              if _type == "date_histogram":
                  for entry in aggs[key].get("entries", []):
                      for k, v in list(entry.items()):
                          if k in ["count", "max", "min", "total_count", "mean", "total"]:
                              continue
                          if not isinstance(entry[k], datetime):
                              entry[k] = datetime.utcfromtimestamp(v / 1e3)
docs: This function convert date_histogram aggs to datetime