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

package guardduty

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

// Lists Amazon GuardDuty findings statistics for the specified detector ID. There
// might be regional differences because some flags might not be available in all
// the Regions where GuardDuty is currently supported. For more information, see
// Regions and endpoints (https://docs.aws.amazon.com/guardduty/latest/ug/guardduty_regions.html)
// .
func (c *Client) GetFindingsStatistics(ctx context.Context, params *GetFindingsStatisticsInput, optFns ...func(*Options)) (*GetFindingsStatisticsOutput, error) {
	if params == nil {
		params = &GetFindingsStatisticsInput{}
	}

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

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

type GetFindingsStatisticsInput struct {

	// The ID of the detector that specifies the GuardDuty service whose findings'
	// statistics you want to retrieve.
	//
	// This member is required.
	DetectorId *string
    
func (c *Client) addOperationGetFindingsStatisticsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsRestjson1_serializeOpGetFindingsStatistics{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpGetFindingsStatistics{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "GetFindingsStatistics"); 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 = addOpGetFindingsStatisticsValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetFindingsStatistics(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
}