fn build_dictionary_array<K: ArrowDictionaryKeyType>(
rows: &StringRecords<'_>,
col_idx: usize,
null_regex: &NullRegex,
) -> Result<ArrayRef, ArrowError>fn build_dictionary_array<K: ArrowDictionaryKeyType>(
rows: &StringRecords<'_>,
col_idx: usize,
null_regex: &NullRegex,
) -> Result<ArrayRef, ArrowError>