public void setMy_64bit_intIsSet(boolean value) {
    __isset_bitfield = org.apache.thrift.EncodingUtils.setBit(__isset_bitfield, __MY_64BIT_INT_ISSET_ID, value);
  }
Returns true if field my_64bit_int is set (has been assigned a value) and false otherwise
serde/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/serde2/thrift/test/MegaStruct.java