code: def params(optimizer: Optimizer) -> List[nn.Parameter]:
      """
      Return all parameters controlled by the optimizer
      Args:
          optimizer: optimizer
  
      Returns:
          Flat list of parameters from all ``param_groups``
      """
      ret = []
      for param_group in optimizer.param_groups:
          ret += [p for p in param_group["params"] if p.requires_grad]
      return ret
  
label_desc: Use image node_id 1 for calling a global function with example usage: params(optimizer) and returns: ret