fn caller(
words: &VoicemailWords,
text: &str,
region: Option<&Region>,
) -> Option<(String, String)>Expand description
The caller’s number in a text: the numbers written in it, the one after
words that name a caller first (caller_leads: “de la part du”,
“appelant”, “from”), never one after words that name your own line
(own_line: “votre ligne”, “your number”).