Function export_csv 

pub fn export_csv(keys: &[PrivateKey], options: CsvOptions) -> Result<String>

Export multiple private keys to CSV format.

Example

use rustywallet_export::{export_csv, CsvOptions, CsvColumn, Network};
use rustywallet_keys::prelude::PrivateKey;

let keys: Vec<PrivateKey> = (0..3).map(|_| PrivateKey::random()).collect();
let csv = export_csv(&keys, CsvOptions::new()).unwrap();
println!("{}", csv);