in src/clubcard.rs [187:195]
fn approximate_size_of(&self) -> usize {
self.universe.approximate_size_of()
+ self.partition.approximate_size_of()
+ self.index.approximate_size_of()
+ size_of::<Vec<Vec<u8>>>()
+ 8 * self.approx_filter.iter().map(|x| x.len()).sum::<usize>()
+ size_of::<Vec<u8>>()
+ 8 * self.exact_filter.len()
}