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

package appsync

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"github.com/aws/aws-sdk-go-v2/aws/protocol/restjson"
	"github.com/aws/aws-sdk-go-v2/service/appsync/types"
	smithy "github.com/aws/smithy-go"
	smithyio "github.com/aws/smithy-go/io"
	"github.com/aws/smithy-go/middleware"
	"github.com/aws/smithy-go/ptr"
	smithytime "github.com/aws/smithy-go/time"
	smithyhttp "github.com/aws/smithy-go/transport/http"
	"io"
	"strings"
)

type awsRestjson1_deserializeOpAssociateApi struct {
}

func (*awsRestjson1_deserializeOpAssociateApi) ID() string {
	return "OperationDeserializer"
}

func (m *awsRestjson1_deserializeOpAssociateApi) HandleDeserialize(ctx context.Context, in middleware.DeserializeInput, next middleware.DeserializeHandler) (
	out middleware.DeserializeOutput, metadata middleware.Metadata, err error,
) {
	out, metadata, err = next.HandleDeserialize(ctx, in)
	if err != nil {
		return out, metadata, err
	}

	response, ok := out.RawResponse.(*smithyhttp.Response)
	if !ok {
		return out, metadata, &smithy.DeserializationError{Err: fmt.Errorf("unknown transport type %T", out.RawResponse)}
	}

	if response.StatusCode < 200 || response.StatusCode >= 300 {
		return out, metadata, awsRestjson1_deserializeOpErrorAssociateApi(response, &metadata)
	}
	output := &AssociateApiOutput{}
	out.Resu
    
func awsRestjson1_deserializeOpErrorUpdateResolver(response *smithyhttp.Response, metadata *middleware.Metadata) error {
	var errorBuffer bytes.Buffer
	if _, err := io.Copy(&errorBuffer, response.Body); err != nil {
		return &smithy.DeserializationError{Err: fmt.Errorf("failed to copy error response body, %w", err)}
	}
	errorBody := bytes.NewReader(errorBuffer.Bytes())

	errorCode := "UnknownError"
	errorMessage := errorCode

	headerCode := response.Header.Get("X-Amzn-ErrorType")
	if len(headerCode) != 0 {
		errorCode = restjson.SanitizeErrorCode(headerCode)
	}

	var buff [1024]byte
	ringBuffer := smithyio.NewRingBuffer(buff[:])

	body := io.TeeReader(errorBody, ringBuffer)
	decoder := json.NewDecoder(body)
	decoder.UseNumber()
	jsonCode, message, err := restjson.GetErrorInfo(decoder)
	if err != nil {
		var snapshot bytes.Buffer
		io.Copy(&snapshot, ringBuffer)
		err = &smithy.DeserializationError{
			Err:      fmt.Errorf("failed to decode response body, %w", err),
			Snapshot: snapshot.Bytes(),
		}
		return err
	}

	errorBody.Seek(0, io.SeekStart)
	if len(headerCode) == 0 && len(jsonCode) != 0 {
		errorCode = restjson.SanitizeErrorCode(jsonCode)
	}
	if len(message) != 0 {
		errorMessage = message
	}

	switch {
	case strings.EqualFold("BadRequestException", errorCode):
		return awsRestjson1_deserializeErrorBadRequestException(response, errorBody)

	case strings.EqualFold("ConcurrentModificationException", errorCode):
		return awsRestjson1_deserializeErrorConcurrentModificationException(response, errorBody)

	case strings.EqualFold("InternalFailureException", errorCode):
		return awsRestjson1_deserializeErrorInternalFailureException(response, errorBody)

	case strings.EqualFold("NotFoundException", errorCode):
		return awsRestjson1_deserializeErrorNotFoundException(response, errorBody)

	case strings.EqualFold("UnauthorizedException", errorCode):
		return awsRestjson1_deserializeErrorUnauthorizedException(response, errorBody)

	default:
		genericError := &smithy.GenericAPIError{
			Code:    errorCode,
			Message: errorMessage,
		}
		return genericError

	}
}