code: func (c *CloudFormation) GetStackPolicy(input *GetStackPolicyInput) (*GetStackPolicyOutput, error) {
  	req, out := c.GetStackPolicyRequest(input)
  	return out, req.Send()
  }
docs: // GetStackPolicy API operation for AWS CloudFormation.
  //
  // Returns the stack policy for a specified stack. If a stack doesn't have a
  // policy, a null value is returned.
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for AWS CloudFormation's
  // API operation GetStackPolicy for usage and error information.
  // See also, https://docs.aws.amazon.com/goto/WebAPI/cloudformation-2010-05-15/GetStackPolicy