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

package workspaces

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

// Disassociates the specified application from a WorkSpace.
func (c *Client) DisassociateWorkspaceApplication(ctx context.Context, params *DisassociateWorkspaceApplicationInput, optFns ...func(*Options)) (*DisassociateWorkspaceApplicationOutput, error) {
	if params == nil {
		params = &DisassociateWorkspaceApplicationInput{}
	}

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

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

type DisassociateWorkspaceApplicationInput struct {

	// The identifier of the application.
	//
	// This member is required.
	ApplicationId *string

	// The identifier of the WorkSpace.
	//
	// This member is required.
	WorkspaceId *string

	noSmithyDocumentSerde
}

type DisassociateWorkspaceApplicationOutput struct {

	// Information about the targeted association.
	Association *types.WorkspaceResourceAssociation

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationDisassociateWorkspaceApplicationMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil
    
func (c *Client) addOperationDisassociateWorkspaceApplicationMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpDisassociateWorkspaceApplication{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpDisassociateWorkspaceApplication{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "DisassociateWorkspaceApplication"); 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 = addOpDisassociateWorkspaceApplicationValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDisassociateWorkspaceApplication(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
}