@Override
      public String get(String key) {
        Bytes ibw = new Bytes(Bytes.toBytes(key));
        if (!m.containsKey(ibw)) return null;
        Bytes value = m.get(ibw);
        if (value == null || value.get() == null) return null;
        return Bytes.toString(value.get());
      }
Add Bytes map to config list. This map is generally created by HTableDescriptor or
HColumnDescriptor, but can be abstractly used. The added configuration overrides the previous
ones if there are name collisions. Bytes map
@return this, for builder pattern
hbase-common/src/main/java/org/apache/hadoop/hbase/CompoundConfiguration.java