code: public static DepIoChart insideOutsideSingleRoot(double[] fracRoot, double[][] fracChild) {
          final boolean singleRoot = true;        
          return insideOutside(fracRoot, fracChild, singleRoot);
      }
docs: Runs the inside-outside algorithm for dependency parsing.
  
  @param fracRoot Input: The edge weights from the wall to each child.
  @param fracChild Input: The edge weights from parent to child.
  @return The parse chart.