public static _Fields findByThriftId(int fieldId){
switch (fieldId) {
case 1:
    return AVERAGE_LOAD;
case 2:
  return OLD_GC;
case 3:
return THREAD_NUM;
case 4:
return QUEUE_SIZE;
case 5:
return METHOD_QPS_MAP;
default :
return null;
}
}

public static _Fields findByThriftId ( int fieldId ) { switch ( fieldId ) { case 1 : return AVERAGE_LOAD ; case 2 : return OLD_GC ; case 3 : return THREAD_NUM ; case 4 : return QUEUE_SIZE ; case 5 : return METHOD_QPS_MAP ; default : return null ; } }
find the _fields constant that matches fieldid , or null if its not found .
