pub type SliceBuilderNewFn = fn() -> PtrMut<'static>;Expand description
Creates a new slice builder for a pointer: ie. for Arc<[u8]>, it builds a
Vec<u8> internally, to which you can push, and then turn into an Arc<[u8]> at
the last stage.
This works for any U in Arc<[U]> because those have separate concrete implementations, and
thus, separate concrete vtables.