code: public List<String> getFingerprints() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "getFingerprints");
          List<String> ids = (List<String>) getHdr2().getField(JsHdr2Access.FINGERPRINTS_RFPLIST_ID);
          if (ids != null) {
              // Don't return the actual JSVaryingListImpl contained in the message.
              ids = new ArrayList<String>(ids);
          }
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "getFingerprints", ids);
          return ids;
      }
docs: The returns the ordered list of the Fingerprints of the MEs and/or MQ Clusters
  the message has visited, or null if the message is not a Publish or has not
  visited any MEs/Clusters.
  
  Javadoc description supplied by JsMessage interface.