_source sorting while retrieving the data from es

hi if iam a query like this

query = {"query":{"bool":{"must":[{
            "range":{
                "timestamp":{
                    from_time_key:from_time,
                    to_time_key:to_time
                    }
                }
            }
            ]}},"_source":["timestamp","host","program","severity","severity_code","facility","facility_code","pri","tag","message"]}

iam getting the data but not in the order which i have given in the source field , how can i sort it according to the format which i have given above

JSON is not an ordered data structure, so there's no way to do that sorry.

ok cool