use super::*; // ANCHOR: util1 #[salsa::query_group(Request)] trait RequestUtil: RequestParser { fn content_type(&self) -> Option; } fn content_type(db: &dyn RequestUtil) -> Option { db.parse() .header .iter() .find(|header| header.key == "content-type") .map(|header| header.value.clone()) } // ANCHOR_END: util1