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_CreateFleet.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"
	"time"
)

// Creates an EC2 Fleet that contains the configuration information for On-Demand
// Instances and Spot Instances. Instances are launched immediately if there is
// available capacity. A single EC2 Fleet can include multiple launch
// specifications that vary by instance type, AMI, Availability Zone, or subnet.
// For more information, see EC2 Fleet (https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-fleet.html)
// in the Amazon EC2 User Guide.
func (c *Client) CreateFleet(ctx context.Context, params *CreateFleetInput, optFns ...func(*Options)) (*CreateFleetOutput, error) {
	if params == nil {
		params = &CreateFleetInput{}
	}

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

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

type CreateFleetInput struct {

	// The configuration for the EC2 Fleet.
	//
	// This member is required.
	LaunchTemplateConfigs []types.FleetLaunchTemplateConfigRequest

	// The number of units to request.
	//
	// This member is required.
	TargetCapacitySpecification *types.TargetCapacitySpecificationRequest

	// Unique, case-sensitive identifier that you provide to ensure the idempotency of
	// the request. For more information, see Ensuring idempotency (https://docs.aws.amazon.com/AWSEC2/latest/APIReference/Run_Instance_Idempotency.html)
	// .
	ClientToken *string

	// Reserved.
	Context *string

	// Checks whether you have the required permissions for the action, without
	// actually making the request, and 
    
func (c *Client) addOperationCreateFleetMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsEc2query_serializeOpCreateFleet{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsEc2query_deserializeOpCreateFleet{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "CreateFleet"); 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 = addOpCreateFleetValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opCreateFleet(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
}