docs: public void addAllOutOfBandNodesToHead (@Nonnull final List <IHCNode> aAllOOBNodes)
    {
      ValueEnforcer.notNull (aAllOOBNodes, "AllOOBNodes");
      // And now add all to head in the correct order
      for (final IHCNode aNode : aAllOOBNodes)
      {
        final IHCNode aUnwrappedNode = HCHelper.getUnwrappedNode (aNode);
  
        // Node for the body?
        if (HCJSNodeDetector.isDirectJSNode (aUnwrappedNode))
          m_aHead.addJS (aNode);
        else
          if (HCCSSNodeDetector.isDirectCSSNode (aUnwrappedNode))
            m_aHead.addCSS (aNode);
          else
            throw new IllegalStateException ("Found illegal out-of-band head node: " + aNode);
      }
    }