error: Twox{64, 128, 256} and Identity are at not secure!
  --> $DIR/missing_security_doc.rs:18:1
   |
LL | pub type Foo2<K, V> = Bar<Twox64Concat, K, V>;
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D missing-security-doc` implied by `-D warnings`
help: use Blake2, or add a # Security doc comment describing why the usage is correct
   |
LL + /// # Security
LL + /// Twox64Concat is safe because the ...
   |

error: aborting due to previous error