Macro setup_panic 

macro_rules! setup_panic {
    (@field_arm colors $value:expr, $meta:expr) => { ... };
    (@field_arm $field:ident $value:expr, $meta:expr) => { ... };
    (
        $(name: $name:expr,)?
        $(short_name: $short_name:expr,)?
        $(version: $version:expr,)?
        $(repository: $repository:expr,)?
        $(messages: {
            $(colors: $colors:expr,)?
            $(head: $head:expr,)?
            $(body: $body:expr,)?
            $(footer: $footer:expr)?
        })?
    ) => { ... };
}