Macro tuple_seq_as_map_impl 

macro_rules! tuple_seq_as_map_impl {
    (
        $tyorig:ident < T $(: $($bound:ident $(+)?)+)? $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)* )* >,
        $with_capacity:expr,
        $append:ident
    ) => { ... };
}