| ^^^^^^^^^^^ the trait `Map<usize, isize>` is not implemented for `Box<dyn Map<isize, isize>>`
|
= help: the trait `Map<K, V>` is implemented for `HashMap<K, V>`
| ^^^^^^^^^^^ the trait `Map<usize, isize>` is not implemented for `Box<dyn Map<isize, isize>>`
|
= help: the trait `Map<K, V>` is implemented for `HashMap<K, V>`