code: def run(
      self, first: Union[List[str], str], second: Union[List[str], str]
  ):
      """
      Concatenates two values
      """
      if isinstance(first, str) and isinstance(second, str):
          res = [first, second]
      elif isinstance(first, list) and isinstance(second, list):
          res = first + second
      elif isinstance(first, list) and isinstance(second, str):
          res = first + [second]
      elif isinstance(first, str) and isinstance(second, list):
          res = [first] + second
      return {"value": res}
  
label_desc: Use image node_id 1 for calling the Concatenate obj's underlying member method code with example usage: obj.run(first, second) and returns: dict