fn party(leads: &[String], after: &str) -> Option<String>Expand description
Who the payment went to or came from, in what follows its amount: “à Exemple
Retail.”, “en faveur de SHOP”, “de Jean Exemple (jean@example.org)”.
leads: the words before the name (Payments::leads), the longest tried
first (“de la part de” before “de”), a space after each.