code: private void setExternalProperties(String name, HColumnDescriptor hColumnDescriptor)
      {
          Properties properties = externalProperties != null ? externalProperties.get(name) : null;
          if (properties != null && !properties.isEmpty())
          {
              for (Object obj : properties.keySet())
              {
                  hColumnDescriptor
                          .setValue(Bytes.toBytes(obj.toString()), Bytes.toBytes(properties.get(obj).toString()));
              }
          }
      }
docs: Sets the external properties.
  
  @param name
  the name
  @param hColumnDescriptor
  the h column descriptor