You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: api_op_StopStackSetOperation.go
    path of file: ./repos/aws-sdk-go-v2/service/cloudformation
    
    the code of the file until where you have to start completion: // Code generated by smithy-go-codegen DO NOT EDIT.

package cloudformation

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/service/cloudformation/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Stops an in-progress operation on a stack set and its associated stack
// instances. StackSets will cancel all the unstarted stack instance deployments
// and wait for those are in-progress to complete.
func (c *Client) StopStackSetOperation(ctx context.Context, params *StopStackSetOperationInput, optFns ...func(*Options)) (*StopStackSetOperationOutput, error) {
	if params == nil {
		params = &StopStackSetOperationInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "StopStackSetOperation", params, optFns, c.addOperationStopStackSetOperationMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*StopStackSetOperationOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type StopStackSetOperationInput struct {

	// The ID of the stack operation.
	//
	// This member is required.
	OperationId *string

	// The name or unique ID of the stack set that you want to stop the operation for.
	//
	// This member is required.
	StackSetName *string

	// [Service-managed permissions] Specifies whether you are acting as an account
	// administrator in the organization's management account or as a delegated
	// administrator in a member account. By default, SELF is specified. Use SELF for
	// stack sets with self-managed permissions.
	//   - If you are signed in to the management account, specify SELF .
    
func (c *Client) addOperationStopStackSetOperationMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsquery_serializeOpStopStackSetOperation{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsquery_deserializeOpStopStackSetOperation{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "StopStackSetOperation"); err != nil {
		return fmt.Errorf("add protocol finalizers: %v", err)
	}

	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = addClientRequestID(stack); err != nil {
		return err
	}
	if err = addComputeContentLength(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = addComputePayloadSHA256(stack); err != nil {
		return err
	}
	if err = addRetry(stack, options); err != nil {
		return err
	}
	if err = addRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = addRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addClientUserAgent(stack, options); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
		return err
	}
	if err = addOpStopStackSetOperationValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opStopStackSetOperation(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = addRecursionDetection(stack); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	if err = addDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	return nil
}