code: public Node attribute(final String name, final Object value) {
          return attribute(name, String.valueOf(value));
      }
docs: Add or override a named attribute.<br/>
  <br/>
  value will be converted to String using String.valueOf(value);
  
  @param name
  The attribute name
  @param value
  The given value
  @return This {@link Node}
  @see #attribute(String, String)