message: Add a doc-comment about the new public field
diff: @@ -50,6 +50,8 @@ pub enum WasiError {
  /// The environment provided to the WASI imports.
  #[derive(Debug, Clone)]
  pub struct WasiEnv {
  + /// Shared state of the WASI system. Manages all the data that the
  + /// executing WASI program can see.
  pub state: Arc<Mutex<WasiState>>,
  memory: Arc<WasiMemory>,
  }
  