code: public boolean hasLogger(final String name, final MessageFactory messageFactory) {
          return getOrCreateInnerMap(factoryKey(messageFactory)).containsKey(name);
      }
docs: Detects if a Logger with the specified name and MessageFactory exists.
  @param name The Logger name to search for.
  @param messageFactory The message factory to search for.
  @return true if the Logger exists, false otherwise.
  @since 2.5