code: def pial_surface_mesh():
      """Get fsaverage mesh for testing."""
      return load_fsaverage()["pial"]
  
file_path: nilearn/nilearn/experimental/surface/tests/conftest.py
imports: from typing import Callable
  import numpy
  import pytest
  from nilearn.experimental.surface import InMemoryMesh, PolyMesh, SurfaceImage, load_fsaverage
label_desc: Use image node_id 7 for calling a global function with example usage: pial_surface_mesh() and returns: load_fsaverage