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_UpdateTemplateSyncConfig.go
    path of file: ./repos/aws-sdk-go-v2/service/proton
    
    the code of the file until where you have to start completion: // Code generated by smithy-go-codegen DO NOT EDIT.

package proton

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

// Update template sync configuration parameters, except for the templateName and
// templateType . Repository details (branch, name, and provider) should be of a
// linked repository. A linked repository is a repository that has been registered
// with Proton. For more information, see CreateRepository .
func (c *Client) UpdateTemplateSyncConfig(ctx context.Context, params *UpdateTemplateSyncConfigInput, optFns ...func(*Options)) (*UpdateTemplateSyncConfigOutput, error) {
	if params == nil {
		params = &UpdateTemplateSyncConfigInput{}
	}

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

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

type UpdateTemplateSyncConfigInput struct {

	// The repository branch for your template.
	//
	// This member is required.
	Branch *string

	// The repository name (for example, myrepos/myrepo ).
	//
	// This member is required.
	RepositoryName *string

	// The repo
    
func (c *Client) addOperationUpdateTemplateSyncConfigMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsjson10_serializeOpUpdateTemplateSyncConfig{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpUpdateTemplateSyncConfig{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "UpdateTemplateSyncConfig"); 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 = addOpUpdateTemplateSyncConfigValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opUpdateTemplateSyncConfig(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
}