code: def test_validate_should_interpret_optional_clause(self):
      specification = [
          dict(name="name", allow_empty=False, optional=True)
      ]
      body = {}
  
      validator = GcpBodyFieldValidator(specification, "v1")
  
      assert validator.validate(body) is None
  
imports: from __future__ import annotations
  import pytest
  from airflow.providers.google.cloud.utils.field_validator import GcpBodyFieldValidator, GcpFieldValidationException, GcpValidationSpecificationException
label_desc: Use image node_id 13 for calling the TestGcpBodyFieldValidator obj's underlying member method code with example usage: obj.test_validate_should_interpret_optional_clause() without return types