docs: public List<ContentKeyAuthorizationPolicyRestriction> getRestrictions() {
          List<ContentKeyAuthorizationPolicyRestriction> result = new ArrayList<ContentKeyAuthorizationPolicyRestriction>();
          List<ContentKeyAuthorizationPolicyRestrictionType> restrictionsTypes = getContent().getRestrictions();
  
          if (restrictionsTypes != null) {
              for (ContentKeyAuthorizationPolicyRestrictionType restrictionType : restrictionsTypes) {
                  ContentKeyAuthorizationPolicyRestriction contentKeyAuthPolicyRestriction = new ContentKeyAuthorizationPolicyRestriction(
                          restrictionType.getName(), restrictionType.getKeyRestrictionType(),
                          restrictionType.getRequirements());
                  result.add(contentKeyAuthPolicyRestriction);
              }
          }
  
          return result;
      }