code: def test_multiobjective_log_parameters(tmp_path: Path) -> None:
      filepath = tmp_path / "logs.txt"
      instrum = ng.p.Instrumentation(
          None,
          2.0,
          blublu="blublu",
          array=ng.p.Array(shape=(3, 2)),
          multiobjective=True,
      )
      optimizer = optimizerlib.OnePlusOne(
          parametrization=instrum, budget=2
      )
      optimizer.register_callback(
          "tell", ng.callbacks.ParametersLogger(filepath, append=False)
      )
      optimizer.minimize(_func, verbosity=2)
      # pickling
      logger = callbacks.ParametersLogger(filepath)
      logs = logger.load_flattened()
      assert len(logs) == 2
  
imports: import time
  from pathlib import Path
  import logging
  import os
  import numpy
  import nevergrad
  import nevergrad.common.typing
  from .None import optimizerlib
  from .None import callbacks
label_desc: Use image node_id 3 for calling a global function with example usage: test_multiobjective_log_parameters(tmp_path) without return types