code: public byte[] compHandshakeData(CommsConnection conn, int version, byte[] data) {
      try {
        return SchemaManager.receiveHandshake(conn, data);
      } catch (Exception ex) {
        FFDCFilter.processException(ex, "compData", "96", this);
        return null;
      }
    }
docs: /*
  This method will be invoked when data is received on a connection from a
  corresponding 'CommsConnection.mfpHandshakeExchange()' method.
  We use this to transfer lists of known schema ids.