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_DescribeVpcEndpointConnections.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"
)

// Describes the VPC endpoint connections to your VPC endpoint services, including
// any endpoints that are pending your acceptance.
func (c *Client) DescribeVpcEndpointConnections(ctx context.Context, params *DescribeVpcEndpointConnectionsInput, optFns ...func(*Options)) (*DescribeVpcEndpointConnectionsOutput, error) {
	if params == nil {
		params = &DescribeVpcEndpointConnectionsInput{}
	}

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

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

type DescribeVpcEndpointConnectionsInput struct {

	// 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.
	//   - ip-address-type - The IP address type ( ipv4 | ipv6 ).
	//   - service-id - The ID of the service.
	//   - vpc-endpoint-owner - The ID of the Amazon Web Services account ID that owns
	//   the endpoint.
	//   - vpc-endpoint-state - The state of the endpoint ( pendingAcceptance | pending
	//   | available | deleting | deleted | rejecte
    
func (c *Client) addOperationDescribeVpcEndpointConnectionsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsEc2query_serializeOpDescribeVpcEndpointConnections{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsEc2query_deserializeOpDescribeVpcEndpointConnections{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "DescribeVpcEndpointConnections"); 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 = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeVpcEndpointConnections(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
}