code: def test_nonlinearity_init(pretrain_file):
      """
      Tests that different initialization methods of the nonlinearities result in valid tensors
      """
      model = build_model(pretrain_file, "--nonlinearity", "relu")
      run_forward_checks(model)
  
      model = build_model(pretrain_file, "--nonlinearity", "tanh")
      run_forward_checks(model)
  
      model = build_model(pretrain_file, "--nonlinearity", "silu")
      run_forward_checks(model)
  
imports: import os
  import pytest
  import torch
  from stanza.models.common import pretrain
  from stanza.models.common.utils import set_random_seed
  from stanza.models.constituency import parse_transitions
  from stanza.tests import *
  from stanza.tests.constituency import test_parse_transitions
  from stanza.tests.constituency.test_trainer import build_trainer
label_desc: Use image node_id 19 for calling a global function with example usage: test_nonlinearity_init(pretrain_file) without return types