This is an ESLint plugin that infers whether an import looks like a Haste module name. To keep the linter fast and simple, it does not look in the Haste map. Instead, it looks for uppercase characters in single-name import paths, since npm has disallowed uppercase letters in package names for a long time. There are some false negatives (e.g. "merge" is a Haste module and this linter rule would not pick it up) but those are about 1.1% of the module names in the RN repo, and unit tests and integration tests will fail anyway once Haste is turned off.

Test Plan: Run `yarn lint` as a sanity check. Modify an import statement to use a Haste module name and verify the linter reports an error. Do the same with a require call.