Function load_csv_from_reader 

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

Simple wrapper for loading CSV without advanced features. Defaults to comma delimiter; for other delimiters use load_csv_from_reader_with_opts.