code: def test_explicit_list_of_ops(valid_instance):
      """Test the validity of operators that could not be auto-generated."""
      assert_valid(valid_instance)
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane.operation import Operator
  from pennylane.ops.functions import assert_valid
label_desc: Use image node_id 9 for calling a global function with example usage: test_explicit_list_of_ops(valid_instance) without return types