code: def add(self, val1, val2):
      """Return the added values.
  
      :param val1: First number to add.
      :type val1: int
      :param val2: Second number to add.
      :type val2: int
      :rtype: int
  
      """
  
      return val1 + val2
  
label_desc: Use image node_id 2 for calling the Foo obj's underlying member method code with example usage: obj.add(val1, val2) and returns: unknown