@Nullable
    private Integer compiledNodeIndex(@Nullable Integer delegateNodeIndex) {
      if (delegateNodeIndex == null) return null;
      if (myDelegateNodesVisibility.isVisible(delegateNodeIndex)) {
        return myNodesMap.getShortIndex(delegateNodeIndex);
      }
      else {
        return -1;
      }
    }
@Nullable
    private Integer compiledNodeIndex(@Nullable Integer delegateNodeIndex)