code: public static EntityTypeActionOperation<String> getProtectionKeyId(
              ContentKeyType contentKeyType) {
          return new GetProtectionKeyIdActionOperation("GetProtectionKeyId")
                  .addQueryParameter("contentKeyType",
                          String.format("%d", contentKeyType.getCode()))
                  .setAcceptType(MediaType.APPLICATION_XML_TYPE);
      }
docs: Gets the protection key id.
  
  @param contentKeyType
  the content key type
  @return the protection key id