code: def test_identity(self):
      operation = Identity("False")
      operation.eval()
  
      resolved_value = operation.resolved_value
      assert BooleanValues.FALSE == resolved_value
  
      operation = Identity("TrUe")
      operation.eval()
  
      resolved_value = operation.resolved_value
      assert BooleanValues.TRUE == resolved_value
  
      operation = Identity("unknown")
      operation.eval()
  
      resolved_value = operation.resolved_value
      assert BooleanValues.UNKNOWN == resolved_value
  
imports: from __future__ import absolute_import
  from unittest import TestCase
  from sagemaker.jumpstart.filters import FILTER_OPERATOR_STRING_MAPPINGS, And, BooleanValues, FilterOperators, Identity, ModelFilter, Not, Or, parse_filter_string
  from sagemaker.jumpstart.filters import evaluate_filter_expression
label_desc: Use image node_id 4 for calling the TestFilterOperators obj's underlying member method code with example usage: obj.test_identity() without return types