code: private boolean checkStyle(String style) throws IOException {
  		if (CSL.supportsStyle(style)) {
  			//style is supported
  			return true;
  		}
  
  		//style is not supported. look for alternatives.
  		String message = "Could not find style in classpath: " + style;
  		Set<String> availableStyles = CSL.getSupportedStyles();
  		
  		//output alternative
  		if (!availableStyles.isEmpty()) {
  			String dyms = ToolUtils.getDidYouMeanString(availableStyles, style);
  			if (dyms != null && !dyms.isEmpty()) {
  				message += "\n\n" + dyms;
  			}
  		}
  		
  		error(message);
  		return false;
  	}
docs: Checks if the given style exists and output possible alternatives if
  it does not
  @param style the style
  @return true if the style exists, false otherwise
  @throws IOException if the style could not be loaded