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_DescribeAutomationStepExecutions.go
    path of file: ./repos/sliver/vendor/github.com/aws/aws-sdk-go-v2/service/ssm
    
    the code of the file until where you have to start completion: // Code generated by smithy-go-codegen DO NOT EDIT.

package ssm

import (
	"context"
	"errors"
	"fmt"
	"github.com/aws/aws-sdk-go-v2/aws"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	internalauth "github.com/aws/aws-sdk-go-v2/internal/auth"
	"github.com/aws/aws-sdk-go-v2/service/ssm/types"
	smithyendpoints "github.com/aws/smithy-go/endpoints"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Information about all active and terminated step executions in an Automation
// workflow.
func (c *Client) DescribeAutomationStepExecutions(ctx context.Context, params *DescribeAutomationStepExecutionsInput, optFns ...func(*Options)) (*DescribeAutomationStepExecutionsOutput, error) {
	if params == nil {
		params = &DescribeAutomationStepExecutionsInput{}
	}

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

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

type DescribeAutomationStepExecutionsInput struct {

	// The Automation execution ID for which you want step execution descriptions.
	//
	// This member is required.
	AutomationExecutionId *string

	// One or more filters to limit the number of step executions returned by the
	// request.
	Filters []types.StepExecutionFilter

	// The maximum number of items to return for this call. The call also returns a
	// token that you can specify in a subsequent call to get the next set of results.
	MaxResults *int32

	// The token for the next set of items to return. (You received this token from a
	// previous call.)
	NextToken *string

	// Indicates whether to list step executions in reverse order by start time. The
	// default value is 'false'.
	ReverseOrder *bool

	noSmithyDocumentSerde
}

type DescribeAutomationStepExecutionsOutput struct {

	// The token to use when requesting the next set of items. If there are no
	// additional items to return, the string is empty.
	NextToken *string

	// A list of details about the current state of all steps that make up an
	// execution.
	StepExecutions []types.St
    
func (c *Client) addOperationDescribeAutomationStepExecutionsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpDescribeAutomationStepExecutions{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpDescribeAutomationStepExecutions{}, middleware.After)
	if err != nil {
		return err
	}
	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
		return err
	}
	if err = addRetryMiddlewares(stack, options); err != nil {
		return err
	}
	if err = addHTTPSignerV4Middleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = awsmiddleware.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 = addDescribeAutomationStepExecutionsResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = addOpDescribeAutomationStepExecutionsValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeAutomationStepExecutions(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = awsmiddleware.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 = addendpointDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	return nil
}