error[E0271]: type mismatch resolving `<Card<&str> as See<NUMBER>>::Inner == i32`
  --> tests/compile_fail/wrong_viewer.rs:36:34
   |
36 |     let card = change_i32_number(card, 2); // <-- This won't work
   |                ----------------- ^^^^ expected `i32`, found `&str`
   |                |
   |                required by a bound introduced by this call
   |
note: required by a bound in `change_i32_number`
  --> tests/compile_fail/wrong_viewer.rs:18:28
   |
16 | fn change_i32_number<T>(mut var: T, by: i32) -> T
   |    ----------------- required by a bound in this
17 | where
18 |     T: Look<see_t::NUMBER, Inner = i32>,
   |                            ^^^^^^^^^^^ required by this bound in `change_i32_number`