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

package worklink

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

// Provides information about the domain.
//
// Deprecated: Amazon WorkLink is no longer supported. This will be removed in a
// future version of the SDK.
func (c *Client) DescribeDomain(ctx context.Context, params *DescribeDomainInput, optFns ...func(*Options)) (*DescribeDomainOutput, error) {
	if params == nil {
		params = &DescribeDomainInput{}
	}

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

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

type DescribeDomainInput struct {

	// The name of the domain.
	//
	// This member is required.
	DomainName *string

	// The ARN of the fleet.
	//
	// This member is required.
	FleetArn *string

	noSmithyDocumentSerde
}

type DescribeDomainOutput struct {

	// The ARN of an issued ACM certificate that is valid for the domain being
	// associated.
	AcmCertificateArn *string

	// The time that the domain was added.
	CreatedTime *time.Time

	// The name to display.
	DisplayName *string

	// The name of the domain.
	DomainName *string

	// The current state for the domain.
	DomainStatus types.DomainStatus

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metad
    
func (c *Client) addOperationDescribeDomainMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsRestjson1_serializeOpDescribeDomain{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpDescribeDomain{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "DescribeDomain"); 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 = addOpDescribeDomainValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeDomain(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
}