[dev-dependencies]
thiserror = "1.0"

  use thiserror::Error;

      #[error(display = "invalid header (expected {:?}, got {:?})", expected, found)]

      #[error("invalid header (expected {expected:?}, got {found:?})")]

      #[error(display = "missing attribute: {}", _0)]

      #[error("missing attribute: {0}")]

//!   # const IGNORE: &str = stringify! {

//!   use thiserror::Error;
//!

//!       #[error(display = "invalid header (expected {:?}, got {:?})", expected, found)]

//!       #[error("invalid header (expected {expected:?}, got {found:?})")]

//!       #[error(display = "missing attribute: {}", _0)]

//!       #[error("missing attribute: {0}")]

//!   # };