Macro slog::slog_b

macro_rules! slog_b {
    (@ $args_ready:expr; $k:expr => $v:expr) => { ... };
    (@ $args_ready:expr; $k:expr => $v:expr, $($args:tt)* ) => { ... };
    (@ $args_ready:expr; ) => { ... };
    (@ $args_ready:expr;, ) => { ... };
    ($($k:expr => $v:expr),* ) => { ... };
}

Alias of b