@Override
            public boolean hasNext() {
                return pos < modCount.length;
            }
Execute the batch and return the mod counts as in {@code execute}, but as a
Jdbi result iterator instead of an array.
@return the number of rows affected per batch part
@see #execute()
@see Statement#executeBatch()
core/src/main/java/org/jdbi/v3/core/statement/PreparedBatch.java