code: def test_validate():
      span_utils = SpanUtils("test this.", ["test", "this", "."])
      assert span_utils.validate([("mock", 5, 10)]) is None
  
file_path: argilla/tests/unit/utils/test_span_utils.py
imports: import pytest
  from argilla.utils.span_utils import SpanUtils
label_desc: Use image node_id 3 for calling a global function with example usage: test_validate() without return types