warning: called `unwrap` on `root` after checking its variant with `is_none`
   --> crates/tree_availability/src/world_tree/tree_data.rs:108:24
    |
101 |         if root.is_none() {
    |         ----------------- help: try: `if let Some(..) = root`
...
108 |             let root = root.unwrap();
    |                        ^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
    = note: `#[warn(clippy::unnecessary_unwrap)]` on by default

warning: unused import: `AtomicBool`
 --> crates/tree_availability/src/world_tree/tree_updater.rs:1:25
  |
1 | use std::sync::atomic::{AtomicBool, AtomicU64};
  |                         ^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default