code: protected Predicate<Map.Entry<String, List<Object>>> filterProvidedGivenAttributes() {
          return entry -> {
              val attributeName = entry.getKey();
              val attributeValue = entry.getValue();
              LOGGER.debug("Received attribute [{}] with value(s) [{}]", attributeName, attributeValue);
              return attributeValue != null;
          };
      }
docs: Filter provided given attributes predicate.
  
  @return the predicate