@hchin snack has a few modules pre-bundled which show up in the auto-complete when you’re writing the import.
Third-party dependencies such as react-native-elements which aren’t bundled by default can be used by adding them to the package.json file. When you import such a module, we prompt you to add it to package.json automatically, however you can also add it manually. If you don’t add it to package.json, you’ll get the “unable to resolve module” error.
Are you getting the error even after adding the dep to package.json? If yes, will be great if you can post the link to the snack where you get this error so I can take a look at what’s wrong.