vlib/v/checker/tests/decompose_interface_err.vv:3:8: warning: module 'arrays' is imported but never used. Use `import arrays as _`, to silence this warning, or just remove the unused import line
    1 | module main
    2 | 
    3 | import arrays
      |        ~~~~~~
    4 | 
    5 | interface Value {}
vlib/v/checker/tests/decompose_interface_err.vv:17:2: warning: unused variable: `region_id`
   15 |         'AF',
   16 |     ]
   17 |     region_id := 'something'
      |     ~~~~~~~~~
   18 |     some_function(...country_ids)
   19 | }
vlib/v/checker/tests/decompose_interface_err.vv:18:16: error: cannot use `string` as `Value` in argument 1 to `some_function`
   16 |     ]
   17 |     region_id := 'something'
   18 |     some_function(...country_ids)
      |                   ~~~~~~~~~~~~~~
   19 | }