public boolean isSetField0() {
    return org.apache.thrift.EncodingUtils.testBit(__isset_bitfield, __FIELD0_ISSET_ID);
  }
Returns true if field field0 is set (has been assigned a value) and false otherwise
serde/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/serde/test/InnerStruct.java