Download http://localhost:4545/vendor/dynamic_non_existent.ts
Download http://localhost:4545/vendor/non-existent.js
Ignoring: Dynamic import not found "http://localhost:4545/vendor/non-existent.js".
    at http://localhost:4545/vendor/dynamic_non_existent.ts:4:16
Vendored 1 module into vendor/ directory.

To use vendored modules, specify the `--import-map vendor/import_map.json` flag when invoking Deno subcommands or add an `"importMap": "<path_to_vendored_import_map>"` entry to a deno.json file.