Macro icu_normalizer::composing_normalize_to

macro_rules! composing_normalize_to {
    ($(#[$meta:meta])*,
     $normalize_to:ident,
     $write:path,
     $slice:ty,
     $prolog:block,
     $always_valid_utf:literal,
     $as_slice:ident,
     $fast:block,
     $text:ident,
     $sink:ident,
     $composition:ident,
     $composition_passthrough_bound:ident,
     $undecomposed_starter:ident,
     $pending_slice:ident,
     $len_utf:ident,
    ) => { ... };
}