question: public static _Fields findByThriftId ( int fieldId ) { switch ( fieldId ) { case 1 : return A ; case 2 : return B ; case 3 : return C ; case 4 : return SHORT_SET ; case 5 : return INT_SET ; case 6 : return MIX_STRUCTLIST ; case 7 : return SHORT_LIST ; case 8 : return ORDERED_STRUCT_MAP ; case 9 : return MIX_STRUCT_MAP ; case 10 : return ORDER_ENUM ; case 11 : return BIN ; default : return null ; } }
target:  Find the _Fields constant that matches fieldId, or null if its not found.