private static void reportMultipleBindingAmbiguity(List<SLF4JServiceProvider> providerList) {
        if (isAmbiguousProviderList(providerList)) {
            Reporter.warn("Class path contains multiple SLF4J providers.");
            for (SLF4JServiceProvider provider : providerList) {
                Reporter.warn("Found provider [" + provider + "]");
            }
            Reporter.warn("See " + MULTIPLE_BINDINGS_URL + " for an explanation.");
        }
    }
Prints a warning message on the console if multiple bindings were found
on the class path. No reporting is done otherwise.
slf4j-api/src/main/java/org/slf4j/LoggerFactory.java