code: protected boolean requiredAttributesFoundInMap(final Map<String, Object> principalAttributes, final Map<String, Set<String>> requiredAttributes) {
          val difference = requiredAttributes.keySet().stream().filter(a -> principalAttributes.keySet().contains(a)).collect(Collectors.toSet());
          LOGGER.debug("Difference of checking required attributes: [{}]", difference);
          if (this.requireAllAttributes && difference.size() < requiredAttributes.size()) {
              return false;
          }
          if (this.requireAllAttributes) {
              return difference.stream().allMatch(key -> requiredAttributeFound(key, principalAttributes, requiredAttributes));
          }
          return difference.stream().anyMatch(key -> requiredAttributeFound(key, principalAttributes, requiredAttributes));
      }
docs: Check whether required attributes are found in the given map.
  
  @param principalAttributes the principal attributes
  @param requiredAttributes  the attributes
  @return the boolean