docs: public static EntityLinkOperation linkDeliveryPolicy(String assetId,
              String deliveryPolicyId) {
          String escapedContentKeyId = null;
          try {
              escapedContentKeyId = URLEncoder.encode(deliveryPolicyId, "UTF-8");
          } catch (UnsupportedEncodingException e) {
              throw new InvalidParameterException("deliveryPolicyId");
          }
          URI contentKeyUri = URI.create(String.format("AssetDeliveryPolicies('%s')",
                  escapedContentKeyId));
          return new EntityLinkOperation(ENTITY_SET, assetId, "DeliveryPolicies",
                  contentKeyUri);
      }