code: public static Creator create(String id, ContentKeyType contentKeyType,
              String encryptedContentKey) {
          return new Creator(id, contentKeyType, encryptedContentKey);
      }
docs: Creates an operation to create a new content key.
  
  @param id
  the id
  @param contentKeyType
  the content key type
  @param encryptedContentKey
  the encrypted content key
  @return The operation