code: def quadratic(x=2, *, a=1, b=0, c=0):
      return a * x * x + b * x + c
  
imports: from __future__ import absolute_import
  import pytest
  import random
  import string
  from mock import MagicMock, Mock, patch
  from sagemaker.experiments.experiment import Experiment
  from sagemaker.experiments.run import Run
  from sagemaker.experiments.trial import _Trial
  from sagemaker.experiments.trial_component import _TrialComponent
  from sagemaker.remote_function.core.stored_function import StoredFunction, JSON_SERIALIZED_RESULT_KEY, _SerializedData
  from sagemaker.remote_function.core.serialization import deserialize_obj_from_s3, serialize_obj_to_s3, CloudpickleSerializer
  from sagemaker.remote_function.core.pipeline_variables import Context, convert_pipeline_variables_to_pickleable
  from sagemaker.remote_function.errors import SerializationError
  from sagemaker.workflow.function_step import _FunctionStep, DelayedReturn
  from sagemaker.workflow.parameters import ParameterFloat
  from sagemaker.utils import sagemaker_timestamp
  from tests.unit.sagemaker.experiments.helpers import TEST_EXP_DISPLAY_NAME, TEST_EXP_NAME, TEST_RUN_DISPLAY_NAME, TEST_RUN_NAME, mock_tc_load_or_create_func, mock_trial_load_or_create_func
label_desc: Use image node_id 4 for calling a global function with example usage: quadratic(x) and returns: unknown