code: private List<DataSource> parseParts(final InputStream entityInputStream,
              final String contentType) {
          try {
              return parsePartsCore(entityInputStream, contentType);
          } catch (IOException e) {
              throw new RuntimeException(e);
          } catch (MessagingException e) {
              throw new RuntimeException(e);
          }
      }
docs: Parses the parts.
  
  @param entityInputStream
  the entity input stream
  @param contentType
  the content type
  @return the list