Airflow的bitshift composition特征返回的类型是airflow.operators.bitshiftcomposer.BitshiftComposer。可以使用以下代码示例创建一个简单的DAG来测试该特性：

from airflow import DAG
from airflow.operators.bitshiftcomposer import BitshiftComposer
from datetime import datetime

default_args = {
    'start_date': datetime(2021, 1, 1),
    'owner': 'airflow',
}

dag = DAG(
    'bitshift_composition_dag',
    default_args=default_args,
    schedule_interval='@daily'
)

# 创建三个算子
operator_1 = BitshiftComposer(task_id='operator_1', argument='foo >> 2', dag=dag)
operator_2 = BitshiftComposer(task_id='operator_2', argument='bar << 4', dag=dag)
operator_3 = BitshiftComposer(task_id='operator_3', argument='(baz | qux) & 3', dag=dag)

# 设置算子依赖关系
operator_1 >> operator_2 >> operator_3