Function array_to_columns

pub fn array_to_columns<A: AsRef<dyn Array> + Send + Sync>(
    array: A,
    type_: ParquetType,
    options: WriteOptions,
    encoding: &[Encoding],
) -> PolarsResult<Vec<DynIter<'static, PolarsResult<Page>>>>

Returns a vector of iterators of Page, one per leaf column in the array