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

package pinpoint

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

// Provides information about the runs of a journey.
func (c *Client) GetJourneyRuns(ctx context.Context, params *GetJourneyRunsInput, optFns ...func(*Options)) (*GetJourneyRunsOutput, error) {
	if params == nil {
		params = &GetJourneyRunsInput{}
	}

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

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

type GetJourneyRunsInput struct {

	// The unique identifier for the application. This identifier is displayed as the
	// Project ID on the Amazon Pinpoint console.
	//
	// This member is required.
	ApplicationId *string

	// The unique identifier for the journey.
	//
	// This member is required.
	JourneyId *string

	// The maximum number of items to include in each page of a paginated response.
	// This parameter is not supported for application, campaign, and journey metrics.
	PageSize *string

	// The NextToken string that specifies which page of results to return in a
	// paginated response.
	Token *string

	noSmithyDocumentSerde
}

type GetJourneyRunsOutput struct {

	// Provides information from all runs of a journey.
	//
	// This member is required.
	JourneyRunsResponse *types.JourneyRunsResponse

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata

	noSmithyDocumentSerde
}

func (c *Client) addOperationGetJourneyRunsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if er
    
func (c *Client) addOperationGetJourneyRunsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsRestjson1_serializeOpGetJourneyRuns{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpGetJourneyRuns{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "GetJourneyRuns"); 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 = addOpGetJourneyRunsValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetJourneyRuns(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
}