code: def test_flow_slow_executor_intra():
      f = Flow().add(uses="SlowExecutor", shards=2)
  
      with f, TimeContext("start flow") as tc:
          assert tc.now() < 8
  
file_path: jina/tests/unit/orchestrate/flow/flow-construct/test_flow_start_noblock.py
imports: import time
  import pytest
  from jina.excepts import RuntimeFailToStart
  from jina.serve.executors import BaseExecutor
  from jina import Flow
  from jina.logging.profile import TimeContext
label_desc: Use image node_id 1 for calling a global function with example usage: test_flow_slow_executor_intra() without return types