2 Checks for use of `Vec<Box<T>>` where T: Sized anywhere in the code.
3 Check the [Box documentation](https://doc.rust-lang.org/std/boxed/index.html) for more information.
6 `Vec` already keeps its contents in a separate area on
7 the heap. So if you `Box` its contents, you just add another level of indirection.
10 Vec<Box<T: Sized>> makes sense if T is a large type (see [#3530](https://github.com/rust-lang/rust-clippy/issues/3530),
16 values: Vec<Box<i32>>,