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

package qbusiness

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

// Asynchronously deletes one or more documents added using the BatchPutDocument
// API from an Amazon Q index. You can see the progress of the deletion, and any
// error messages related to the process, by using CloudWatch.
func (c *Client) BatchDeleteDocument(ctx context.Context, params *BatchDeleteDocumentInput, optFns ...func(*Options)) (*BatchDeleteDocumentOutput, error) {
	if params == nil {
		params = &BatchDeleteDocumentInput{}
	}

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

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

type BatchDeleteDocumentInput struct {

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

	// Documents deleted from the Amazon Q index.
	//
	// This member is required.
	Documents []types.DeleteDocument

	// The identifier of the Amazon Q index that contains the documents to delete.
	//
	// This member is required.
	IndexId *string

	// The identifier of the data source sync during which the documents were deleted.
	DataSourceSyncId *string

	noSmithyDocumentSerde
}

type BatchDeleteDocumentOutput struct {

	// A list of documents that couldn't be removed from the Amazon Q index. Each
	// entry contains an error message that indicates why the document couldn't be
	// removed from the index.
	FailedDocuments []types.FailedDocument

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationBatchDeleteDocumentMiddlewares(stack *middleware.Stack, options Options) (err e
    
func (c *Client) addOperationBatchDeleteDocumentMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsRestjson1_serializeOpBatchDeleteDocument{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpBatchDeleteDocument{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "BatchDeleteDocument"); 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 = addOpBatchDeleteDocumentValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opBatchDeleteDocument(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
}