private static StripeInformationProvider createStripes(int l0Count, byte[]... boundaries)
    throws Exception {
    List<Long> l0Sizes = new ArrayList<>();
    for (int i = 0; i < l0Count; ++i) {
      l0Sizes.add(5L);
    }
    List<List<Long>> sizes = new ArrayList<>();
    for (int i = 0; i <= boundaries.length; ++i) {
      sizes.add(Arrays.asList(Long.valueOf(5)));
    }
    return createStripes(Arrays.asList(boundaries), sizes, l0Sizes);
  }
@param l0Count    Number of L0 files.
@param boundaries Target boundaries.
@return Mock stripes.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/compactions/TestStripeCompactionPolicy.java