code: def test_printing_doesnt_crash(self):
      span_field = SpanField(2, 3, self.text)
      print(span_field)
  
file_path: allennlp/tests/data/fields/span_field_test.py
imports: import numpy
  import pytest
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data import Token
  from allennlp.data.fields import TextField, SpanField
  from allennlp.data.token_indexers import SingleIdTokenIndexer
label_desc: Use image node_id 7 for calling the TestSpanField obj's underlying member method code with example usage: obj.test_printing_doesnt_crash() without return types