wip: reimplement arranger because i'm sick of that shit

crates/device/src/arranger.rs

@@ -3,7 +3,7 @@ use crate::*;
 /// Define a type alias for iterators of sized items (columns).
 macro_rules! def_sizes_iter {
     ($Type:ident => $($Item:ty),+) => {
-        pub(crate) trait $Type<'a> =
+        pub trait $Type<'a> =
             Iterator<Item=(usize, $(&'a $Item,)+ usize, usize)> + Send + Sync + 'a;
     }
 }