MODULES

The classifiers of the modules on the classpath (ServiceLoader, from a module's META-INF/services/me.ahoo.wow.spi.subscription.FailureClassifier), as StoreProviders and TransportProviders are found: each knows the raw failures of its own technology that an application's handler meets (a JDBC driver's in wow-postgres, the JDK's network failures in wow-client), in the order of their class names.