public void initCellFilters() {
    ArrayList<WALCellFilter> cellFilters = new ArrayList<>(filters.length);
    for (WALEntryFilter filter : filters) {
      if (filter instanceof WALCellFilter) {
        cellFilters.add((WALCellFilter) filter);
      }
    }
    this.cellFilters = cellFilters.toArray(new WALCellFilter[cellFilters.size()]);
  }
A {@link WALEntryFilter} which contains multiple filters and applies them in chain order
hbase-server/src/main/java/org/apache/hadoop/hbase/replication/ChainWALEntryFilter.java