public static _Fields findByThriftId(int fieldId){
switch (fieldId) {
case 1:
    return CLIENT_APPKEY;
case 2:
  return TRACE_ID;
case 3:
return SPAN_ID;
case 4:
return ROOT_MESSAGE_ID;
case 5:
return CURRENT_MESSAGE_ID;
case 6:
return SERVER_MESSAGE_ID;
case 7:
return DEBUG;
case 8:
return SAMPLE;
case 9:
return CLIENT_IP;
default :
return null;
}
}

public static _Fields findByThriftId ( int fieldId ) { switch ( fieldId ) { case 1 : return CLIENT_APPKEY ; case 2 : return TRACE_ID ; case 3 : return SPAN_ID ; case 4 : return ROOT_MESSAGE_ID ; case 5 : return CURRENT_MESSAGE_ID ; case 6 : return SERVER_MESSAGE_ID ; case 7 : return DEBUG ; case 8 : return SAMPLE ; case 9 : return CLIENT_IP ; default : return null ; } }
find the _fields constant that matches fieldid , or null if its not found .
