docstr: Get outputs at the specified port.
  
  Parameters
  ----------
  port
      Port from which to get the outputs.
  
  Returns
  -------
  List of outputs.
code: def get_outputs_at(self, port: int) -> List[DataPlaceholder]:
      """Get outputs at the specified port.
  
      Parameters
      ----------
      port
          Port from which to get the outputs.
  
      Returns
      -------
      List of outputs.
      """
      return self._nodes[port].outputs
  
imports: import inspect
  import warnings
  from typing import Any, Callable, Dict, List, Optional, Union, TYPE_CHECKING
  from baikal._core.data_placeholder import DataPlaceholder, is_data_placeholder_list
  from baikal._core.utils import listify, make_name, make_repr
label_desc: Use image node_id 20 for calling the _StepBase obj's underlying member method code with example usage: obj.get_outputs_at(port) and returns: self