…ses as well as their symbols.
…sters. This allows us to be much more flexible with how we check things. We can use functions (as long as they are serializable functions, which is a bit limiting but still better than before) to check things in any way we want. This makes things a bit slower, but allows us to elegantly express some checks that we need to do.
…ix a bug with checking packages.
…e flattening anyway. Thanks to Alan for pointing this out.