public void unsetUnderscore_int() {
    __isset_bitfield = org.apache.thrift.EncodingUtils.clearBit(__isset_bitfield, __UNDERSCORE_INT_ISSET_ID);
  }
Returns true if field myString is set (has been assigned a value) and false otherwise
serde/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/serde2/thrift/test/IntString.java