code: private HttpPrefixFetchFilter getUriPrefixFecthFilter(Object[] customConfigurations) {
  		if (customConfigurations != null) {
  			for (Object customConfiguration : customConfigurations) {
  				if (customConfiguration instanceof HttpPrefixFetchFilter) {
  					return (HttpPrefixFetchFilter) customConfiguration;
  				}
  			}
  		}
  		return null;
  	}
docs: Gets the {@code HttpPrefixFetchFilter} from the given {@code customConfigurations}.
  
  @param customConfigurations the custom configurations of the spider
  @return the {@code HttpPrefixFetchFilter} found, {@code null} otherwise.