traceoptions of flow session

[edit security flow]
Netbox@SRX300-1-RL102# show
traceoptions {
    file selfpolicy size 1m;
    flag session;
    packet-filter term1 {
        source-prefix 192.168.200.1/32;
        destination-prefix 192.168.200.2/32;
    }
    packet-filter term2 {
        source-prefix 192.168.200.2/32;
        destination-prefix 192.168.200.1/32;
    }
}


set security flow traceoptions file selfpolicy
set security flow traceoptions file size 1m
set security flow traceoptions flag basic-datapath
set security flow traceoptions packet-filter term1 source-prefix 192.168.200.1/32
set security flow traceoptions packet-filter term1 destination-prefix 192.168.200.2/32
set security flow traceoptions packet-filter term2 source-prefix 192.168.200.2/32
set security flow traceoptions packet-filter term2 destination-prefix 192.168.200.1/32

Netbox@SRX300-1-RL102# set traceoptions flag ?
Possible completions:
  all                  All events
  basic-datapath       Basic packet flow
  fragmentation        Ip fragmentation and reassembly events
  high-availability    Flow high-availability information
  host-traffic         Flow host-traffic information
  multicast            Multicast flow information
  route                Route lookup information
  session              Session creation and deletion events
  session-scan         Session scan information
  tcp-basic            TCP packet flow
  tunnel               Tunnel information