pub fn maybe_dedup_one(
append_mode: bool,
merge_mode: MergeMode,
field_column_start: usize,
input_iter: BoxedRecordBatchIterator,
) -> BoxedRecordBatchIteratorpub fn maybe_dedup_one(
append_mode: bool,
merge_mode: MergeMode,
field_column_start: usize,
input_iter: BoxedRecordBatchIterator,
) -> BoxedRecordBatchIterator