code: def test_from_params_string(self):
      Initializer.from_params(params="eye")
  
imports: from __future__ import division
  from __future__ import with_statement
  from __future__ import absolute_import
  import json
  import logging
  import math
  import numpy
  import pytest
  import torch
  import _jsonnet
  from allennlp.nn import InitializerApplicator, Initializer
  from allennlp.nn.initializers import block_orthogonal, uniform_unit_scaling
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.common.params import Params
label_desc: Use image node_id 3 for calling the TestInitializers obj's underlying member method code with example usage: obj.test_from_params_string() without return types