code: @Override
      public GetStackPolicyResult getStackPolicy(GetStackPolicyRequest request) {
          request = beforeClientExecution(request);
          return executeGetStackPolicy(request);
      }
docs: <p>
  Returns the stack policy for a specified stack. If a stack doesn't have a policy, a null value is returned.
  </p>
  
  @param getStackPolicyRequest
  The input for the <a>GetStackPolicy</a> action.
  @return Result of the GetStackPolicy operation returned by the service.
  @sample AmazonCloudFormation.GetStackPolicy
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/cloudformation-2010-05-15/GetStackPolicy" target="_top">AWS
  API Documentation</a>