code: private void includeConfigurationInternal(final Configuration conf) {
  
  		if (conf == null) {
  			LOG.error("Given configuration object is null, ignoring it...");
  			return;
  		}
  
  		synchronized (this.confData) {
  
  			final Iterator<String> it = conf.keySet().iterator();
  
  			while (it.hasNext()) {
  
  				final String key = it.next();
  				this.confData.put(key, conf.getString(key, ""));
  			}
  		}
  	}
docs: Internal non-static method to include configuration.
  
  @param conf
  the {@link Configuration} object to merge into the global configuration