Function ringbuffer_def_pre_delete 

pub fn ringbuffer_def_pre_delete<T: CommandTransaction, F>(
    f: F,
) -> ClosureRingBufferDefPreDeleteInterceptor<T, F>
where
    F: for<'a> Fn(&mut RingBufferDefPreDeleteContext<'a, T>) -> Result<()> + Send + Sync + Clone + 'static,