As the former term references a class containing one or more `@BeforeTemplate`
methods, one or more `@Placeholder` methods and an optional `@AfterTemplate`,
while the latter term more narrowly references a single `@BeforeTemplate` or
`@AfterTemplate` method.
The `Refaster` check is now located in the new `refaster-runner` Maven module.
The new `refaster-test-support` module exposes
`RefasterTemplateCollection#validate`, which for a given template collection
validates:
- That there exist corresponding `*Test{Input,Output}.java` files.
- That each template is exercised by precisely one method in these files.
