code: public static Integer selectInteger(Node node, String xpath, Integer defaultValue) {
          return selector.selectInteger(node, xpath, defaultValue);
      }
docs: Extract an integer value from {@code node} or return {@code defaultValue}
  if it is not found.
  
  @param node         the node with the wanted attribute.
  @param xpath        the XPath to extract.
  @param defaultValue the default value.
  @return the value of the path, if existing, else
  defaultValue