1Circle input.rs /^impl Circle {$/;" c 2Circle input.rs /^struct Circle {$/;" s 3area input.rs /^ fn area(&self) -> f64 {$/;" P implementation:Circle signature:(&self) -> f64 4main input.rs /^fn main() {$/;" f signature:() 5radius input.rs /^ radius: f64,$/;" m struct:Circle 6x input.rs /^ x: f64,$/;" m struct:Circle 7y input.rs /^ y: f64,$/;" m struct:Circle 8