docs: def create_placeholder_weld_object(data):
      """Helper method that creates a WeldObject that evaluates to itself.
  
      Parameters
      ----------
      data : numpy.ndarray or WeldObject or str
          Data to wrap around. If str, it is a placeholder or 'str' literal.
  
      Returns
      -------
      WeldObject
          WeldObject wrapped around data.
  
      """
      obj_id, weld_obj = create_weld_object(data)
      weld_obj.weld_code = '{}'.format(str(obj_id))
  
      return weld_obj