Macro match_each_listview_builder 

macro_rules! match_each_listview_builder {
    ($dyn_builder:expr, | $builder:ident | $body:expr) => { ... };
}

Matches a &mut dyn ArrayBuilder against every concrete ListViewBuilder<O, S> instantiation over the OffsetBuilderPType offset/size types (u32, u64, i32, i64), and only those.

Binds the downcast builder as $builder and evaluates $body with it, yielding Some($body); yields None when the builder is not a list-view builder - including when it is a ListBuilder. Callers reach for this instead of match_each_list_builder! when the body needs methods only a list-view builder has, such as append_array_as_repeated_list.