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_GetTransitGatewayPolicyTableAssociations.go
    path of file: ./repos/aws-sdk-go-v2/service/ec2
    
    the code of the file until where you have to start completion: // Code generated by smithy-go-codegen DO NOT EDIT.

package ec2

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/service/ec2/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Gets a list of the transit gateway policy table associations.
func (c *Client) GetTransitGatewayPolicyTableAssociations(ctx context.Context, params *GetTransitGatewayPolicyTableAssociationsInput, optFns ...func(*Options)) (*GetTransitGatewayPolicyTableAssociationsOutput, error) {
	if params == nil {
		params = &GetTransitGatewayPolicyTableAssociationsInput{}
	}

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

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

type GetTransitGatewayPolicyTableAssociationsInput struct {

	// The ID of the transit gateway policy table.
	//
	// This member is required.
	TransitGatewayPolicyTableId *string

	// Checks whether you have the required permissions for the action, without
	// actually making the request, and provides an error response. If you have the
	// required permissions, the error response is DryRunOperation . Otherwise, it is
	// UnauthorizedOperation .
	DryRun *bool

	// The filters associated with the transit gateway policy table.
	Filters []types.Filter

	// The maximum number of results to return with a single call. To retrieve the
	// remaining results, make another call with the returned nextToken value.
	MaxResults *int32

	// The token for the next page of results.
	NextToken *string

	noSmithyDocumentSerde
}

type GetTransitGatewayPolicyTa
    
func (c *Client) addOperationGetTransitGatewayPolicyTableAssociationsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsEc2query_serializeOpGetTransitGatewayPolicyTableAssociations{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsEc2query_deserializeOpGetTransitGatewayPolicyTableAssociations{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "GetTransitGatewayPolicyTableAssociations"); 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 = addOpGetTransitGatewayPolicyTableAssociationsValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetTransitGatewayPolicyTableAssociations(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
}