@Override
      public void run(final @NotNull ProgressIndicator indicator) {
        NullAnalysisResult leaves = calcNullableLeaves(root, treeStructure, map);
        SliceRootNode newRoot = ReadAction.compute(() -> createNewTree(leaves, root, map));
        newRootRef.set(newRoot);
      }
@Override
      public void run(final @NotNull ProgressIndicator indicator)