docs: public org.apache.hadoop.conf.Configuration getOrLoadHadoopConfig() {
  		org.apache.hadoop.conf.Configuration hadoopConfig = this.hadoopConfig;
  		if (hadoopConfig == null) {
  			if (flinkConfig != null) {
  				hadoopConfig = mirrorCertainHadoopConfig(loadHadoopConfigFromFlink());
  			}
  			else {
  				LOG.warn("Flink configuration is not set prior to loading this configuration."
  					+ " Cannot forward configuration keys from Flink configuration.");
  				hadoopConfig = new org.apache.hadoop.conf.Configuration();
  			}
  		}
  		this.hadoopConfig = hadoopConfig;
  		return hadoopConfig;
  	}