Function panic_payload_to_string 

pub fn panic_payload_to_string(payload: &(dyn Any + Send)) -> Cow<'_, str>

Extract a message from a panic payload.

Handles &str, String, &String, and PreLocatedPanic payloads consistently. The borrowed variants are returned as Cow::Borrowed, so the common panic!("literal") case avoids the heap allocation that a String return would force. Unrecognised payload types fall back to a Cow::Borrowed static string.

Call .into_owned() (or .to_string()) at sites that need an owned String.