code: def segment(self, docs, *args, **kwargs):
      for d in docs:
          d.chunks = [
              Document(blob=f"aa{self._label}".encode()),
              Document(blob=f"bb{self._label}".encode()),
          ]
  
file_path: jina/tests/unit/orchestrate/flow/flow-orchestrate/test_flow_merge.py
imports: import random
  import pytest
  from jina import Flow, Executor, requests, Document
  from tests import random_docs, validate_callback
label_desc: Use image node_id 2 for calling the DummySegment obj's underlying member method code with example usage: obj.segment(docs) without return types