code: def test_sanitize_labels_second_noop(pairs):
      """Test that passing the output of sanitize_labels back into the function
      returns its input. Sanitizing a set of sanitized kv pairs should have no
      effect.
  
      """
      once = u.sanitize_labels(pairs)
      twice = u.sanitize_labels(once)
      assert once == twice
  
file_path: caliban/tests/caliban/platform/cloud/test_util.py
imports: import re
  import hypothesis.strategies
  from hypothesis import given
  import caliban.platform.cloud.util
label_desc: Use image node_id 11 for calling a global function with example usage: test_sanitize_labels_second_noop(pairs) without return types