Macro tuple_seq_as_map_impl_intern 

macro_rules! tuple_seq_as_map_impl_intern {
    (
        $tyorig:ident < (K, V) $(: $($bound:ident $(+)?)+)? $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)* )* >,
        $with_capacity:expr,
        $append:ident,
        $ty:ident <KAs, VAs>
    ) => { ... };
}