message: Test size of boxed Modules
diff: @@ -55,6 +55,10 @@ mod tests {
  // So we get this value by trial and error. It can change over time and across platforms.
  let value_size = mem::size_of::<Module>();
  assert_eq!(value_size, 48);
  +
  + // Just in case we want to go that route
  + let boxed_value_size = mem::size_of::<Box<Module>>();
  + assert_eq!(boxed_value_size, 8);
  }
  #[test]
  