code: public static Map<String, String> removeCalculatedProperties(Map<String, String> contentProperties) {
          if (contentProperties != null) {
              contentProperties = new HashMap<>(contentProperties);
              // Remove calculated properties
              contentProperties.remove(StorageProvider.PROPERTIES_CONTENT_MD5);
              contentProperties.remove(StorageProvider.PROPERTIES_CONTENT_CHECKSUM);
              contentProperties.remove(StorageProvider.PROPERTIES_CONTENT_MODIFIED);
              contentProperties.remove(StorageProvider.PROPERTIES_CONTENT_SIZE);
          }
          return contentProperties;
  
      }
docs: Returns a new map with the calculated properties removed. If null, null
  is returned.
  
  @param contentProperties
  @return