error: this expression creates a reference which is immediately dereferenced by the compiler --> src/zip32.rs:179:13 | 179 | &self.sk.to_bytes(), | ^^^^^^^^^^^^^^^^^^^ help: change this to: `self.sk.to_bytes()` | = note: `-D clippy::needless-borrow` implied by `-D warnings` = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow