warning: question mark operator is useless here
  --> bluez-async/src/serde_path.rs:14:5
   |
14 |     Ok(Path::new(string).map_err(|e| D::Error::custom(format!("Invalid D-Bus path: {:?}", e)))?)
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing question mark and `Ok()`: `Path::new(string).map_err(|e| D::Error::custom(format!("Invalid D-Bus path: {:?}", e)))`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_question_mark
   = note: `#[warn(clippy::needless_question_mark)]` on by default