Function load_csv_from_reader_with_opts 

pub fn load_csv_from_reader_with_opts<R: Read>(
    reader: R,
    table_name: &str,
    source_type: &str,
    source_path: &str,
    opts: &CsvReadOptions,
) -> Result<DataTable>

As load_csv_from_reader, but honouring caller-supplied CsvReadOptions (delimiter, headers).