imag/libimagutil/src/debug_result.rs

// Generates a extension for the `Result<T, E>`, named `DebugResult` which has functionality to
// print either `T` or `E` via `debug!()`.
generate_result_logging_extension!(
    DebugResult,
    map_dbg,
    map_dbg_str,
    map_dbg_err,
    map_dbg_err_str,
    |s| { debug!("{}", s); }
);