code: public static String fileTypeAsString( int fileType ) {
  
  		String result;
  		switch( fileType ) {
  		case AGGREGATOR:
  			result = "aggregator";
  			break;
  
  		case GRAPH:
  			result = "graph";
  			break;
  
  		case INSTANCE:
  			result = "intsnace";
  			break;
  
  		case UNDETERMINED:
  			result = "undetermined";
  			break;
  
  		default:
  			result = "unknown";
  			break;
  		}
  
  		return result;
  	}
docs: Transforms a file type into a string.
  @param fileType a file type
  @return a string version of the file type (never null)