warning: dereferencing a tuple pattern where every element takes a reference --> src/schema/document/owned_value.rs:186:21 | 186 | for &(ref k, ref v) in obj { | ^^^^^^^^^^^^^^^ | = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrowed_reference = note: `#[warn(clippy::needless_borrowed_reference)]` on by default help: try removing the `&` and `ref` parts | 186 - for &(ref k, ref v) in obj { 186 + for (k, v) in obj { |