docs: public static void mergeHadoopConf(JobConf jobConf) {
  		// we have to load the global configuration here, because the HadoopInputFormatBase does not
  		// have access to a Flink configuration object
  		org.apache.flink.configuration.Configuration flinkConfiguration = GlobalConfiguration.loadConfiguration();
  
  		Configuration hadoopConf = getHadoopConfiguration(flinkConfiguration);
  		for (Map.Entry<String, String> e : hadoopConf) {
  			if (jobConf.get(e.getKey()) == null) {
  				jobConf.set(e.getKey(), e.getValue());
  			}
  		}
  	}