@Override
    public ComplexUnion build() {
      try {
        ComplexUnion record = new ComplexUnion();
        record.non_nullable_union_value = fieldSetFlags()[0] ? this.non_nullable_union_value : (java.lang.Object) defaultValue(fields()[0]);
        return record;
      } catch (Exception e) {
        throw new org.apache.avro.AvroRuntimeException(e);
      }
    }
Clears the value of the 'non_nullable_union_value' field
samza-sql/src/test/java/org/apache/samza/sql/avro/schemas/ComplexUnion.java