code: public void writeStartFeed(String requestContextURL, Map<String, Object> meta) throws ODataRenderException {
          this.contextURL = checkNotNull(requestContextURL);
          try {
              startFeed(false);
  
              if (ODataUriUtil.hasCountOption(oDataUri) &&
                      meta != null && meta.containsKey("count")) {
                  metadataWriter.writeCount(meta.get("count"));
              }
  
              metadataWriter.writeFeedId(null, null);
              metadataWriter.writeTitle();
              metadataWriter.writeUpdate(dateTime);
              metadataWriter.writeFeedLink(null, null);
          } catch (XMLStreamException | ODataEdmException e) {
              LOG.error("Not possible to marshall feed stream XML");
              throw new ODataRenderException("Not possible to marshall feed stream XML: ", e);
          }
      }
docs: Write start feed to the XML stream.
  
  @param requestContextURL The 'Context URL' to write for the feed. It can not {@code null}.
  @param meta              Additional metadata to write.
  @throws ODataRenderException In case it is not possible to write to the XML stream.