code: protected boolean finalizeAny() {
          GlobalSplitter<I, D> splitter = findSplitterGlobal();
          if (splitter != null) {
              finalizeDiscriminator(splitter.blockRoot, splitter.localSplitter);
              return true;
          }
          return false;
      }
docs: Chooses a block root, and finalizes the corresponding discriminator.
  
  @return {@code true} if a splittable block root was found, {@code false} otherwise.