presto-main/src/main/java/io/prestosql/operator/project/DictionaryAwarePageProjection.java/DictionaryAwarePageProjectionWork/process
class DictionaryAwarePageProjectionWork:        @Override
        public boolean process()
        {
            if (produceLazyBlock) {
                return true;
            }
            else {
                return processInternal();
            }
        }