code: public static RegionCoverage getCoverageFromBigWig(Region region, int windowSize, Path bigwigPath) throws IOException {
          FileUtils.checkFile(bigwigPath);
  
          BigWigManager bigWigManager = new BigWigManager(bigwigPath);
          float[] avgCoverage = bigWigManager.groupBy(region, windowSize);
          return new RegionCoverage(region, windowSize, avgCoverage);
      }
docs: Return the coverage average given a window size from the BigWig file passed.
  @param region Region from which return the coverage
  @param windowSize Window size to average
  @param bigwigPath BigWig path with coverage
  @return One average score per window size spanning the region
  @throws IOException If any error happens reading BigWig file