code: private File filenameFor(final Description method) {
  		String className = method.getClassName();
  		String methodName = method.getMethodName();
  
  		return new File(directory, className + "_" + methodName + ".png");
  	}
docs: Gets the name of the image file with the screenshot.
  
  @param method
  the method name
  @return the file that will cotain the screenshot