code: def test_initialize_model_parallel():
      spawn_for_all_world_sizes(run_test_initialize_model_parallel)
  
imports: import torch
  from fairscale.fair_dev.testing.testing import dist_init, spawn_for_all_world_sizes
  from fairscale.nn.model_parallel import initialize
label_desc: Use image node_id 3 for calling a global function with example usage: test_initialize_model_parallel() without return types