code: @Deprecated
  	public static Long getLastModifiedTime(String resourceFile, Class clazz) {
  
  
  		Assert.notNullOrEmptyTrimmed(resourceFile, "Missing resource file!");
  
  		try {
  			URL url = clazz.getResource(resourceFile);
  			return url.openConnection().getLastModified(); // get last modified date of resource
  		}
  		catch (IOException e) {
  			return null;
  		}
  	}
docs: Get resource last modified date
  
  @param resourceFile to read
  @param clazz        to use for resource access
  @return last modified date or null if resource could not be read