def METHOD_NAME(self, peer: str = None, adapter_port_channel_description: str = None) -> str:
    """
    Implementation of custom code similar to jinja:
    custom_templates/interface_descriptions/connected-endpoints/port-channel-interfaces.j2
    """
    elements = [self._custom_description_prefix, peer, adapter_port_channel_description]
    return "_".join([str(element) for element in elements if element is not None])