docs: private File createFile(ITestResult tr, File parentFolder) {
  
  		String path;
  				
  		if (tr != null) { // tr is null only on tests purpose
  			path = String.format("%s%c%s.png", parentFolder.getAbsolutePath(), File.separatorChar, tr.getName(), getDateSuffix());
  		} else {
  			path = String.format("%s%ctest_%d.png", parentFolder.getAbsolutePath(), File.separatorChar, System.currentTimeMillis());
  		}
  		
  		return new File(path);
  	}