Method docs

crates/cpp/src/lib.rs:1784–1792

(src: &mut Source, docs: &Docs)

    }

    fn docs(src: &mut Source, docs: &Docs) {
        if let Some(docs) = docs.contents.as_ref() {
            for line in docs.trim().lines() {
                src.push_str("/// ");
                src.push_str(line);
                src.push_str("\n");
            }
        }
    }

    fn type_record_param(
        &mut self,