code: def foo(x, y, z):
      return x**2 + y**2 - z**3
  
file_path: hypertunity/hypertunity/tests/test_trial.py
imports: import pytest
  from hypertunity import Domain, Trial
  from hypertunity.optimisation import RandomSearch
  from hypertunity.reports import Table
  from hypertunity.scheduling import Job
  from hypertunity.scheduling.tests.test_scheduler import run_jobs
label_desc: Use image node_id 1 for calling a global function with example usage: foo(x, y, z) and returns: unknown