question: public static _Fields findByThriftId ( int fieldId ) { switch ( fieldId ) { case 1 : return BEGIN_IN_BOTH ; case 2 : return NEWINT ; case 3 : return NEWBYTE ; case 4 : return NEWSHORT ; case 5 : return NEWLONG ; case 6 : return NEWDOUBLE ; case 7 : return NEWSTRUCT ; case 8 : return NEWLIST ; case 9 : return NEWSET ; case 10 : return NEWMAP ; case 11 : return NEWSTRING ; case 12 : return END_IN_BOTH ; default : return null ; } }
target:  Find the _Fields constant that matches fieldId, or null if its not found.