code: def choose_branch(self, context):
      return ["branch_1", "branch_2"]
  
imports: from __future__ import annotations
  import datetime
  import pytest
  from airflow.models.dag import DAG
  from airflow.models.dagrun import DagRun
  from airflow.models.taskinstance import TaskInstance
  from airflow.operators.branch import BaseBranchOperator
  from airflow.operators.empty import EmptyOperator
  from airflow.utils import timezone
  from airflow.utils.session import create_session
  from airflow.utils.state import State
  from airflow.utils.types import DagRunType
label_desc: Use image node_id 1 for calling the ChooseBranchOneTwo obj's underlying member method code with example usage: obj.choose_branch(context) and returns: list