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: helmet.go
    path of file: ./repos/fiber/middleware/helmet
    
    the code of the file until where you have to start completion: package helmet

import (
	"fmt"

	"github.com/gofiber/fiber/v3"
)

// New creates a new middleware handler
func New(config ...Config) fiber.Handler {
	// Init config
	cfg := configDefault(config...)

	// Return middleware handler
	return func(c fiber.Ctx) error {
		// Next request to skip middleware
		if cfg.Next != nil && cfg.Next(c) {
			return c.Next()
		}

		// Set headers
		if cfg.XSSProtection != "" {
			c.Set(fiber.HeaderXXSSProtection, cfg.XSSProtection)
		}

		if cfg.ContentTypeNosniff != "" {
			c.Set(fiber.HeaderXContentTypeOptions, cfg.ContentTypeNosniff)
		}

		if cfg.XFrameOptions != "" {
			c.Set(fiber.HeaderXFrameOptions, cfg.XFrameOptions)
		}

		if cfg.CrossOriginEmbedderPolicy != "" {
			c.Set("Cross-Origin-Embedder-Policy", cfg.CrossOriginEmbedderPolicy)
		}

		if cfg.CrossOriginOpenerPolicy != "" {
			c.Set("Cross-Origin-Opener-Policy", cfg.CrossOriginOpenerPolicy)
		}

		if cfg.CrossOriginResourcePolicy != "" {
			c.Set("Cross-Origin-Resource-Policy", cfg.CrossOriginResourcePolicy)
		}

		if cfg.OriginAgentCluster != "" {
			c.Set("Origin-Agent-Cluster", cfg.OriginAgentCluster)
		}

		if cfg.ReferrerPolicy != "" {
			c.Set("Referrer-Policy", cfg.ReferrerPolicy)
		}

		if cfg.XDNSPrefetchControl 
    
func New(config ...Config) fiber.Handler {
	// Init config
	cfg := configDefault(config...)

	// Return middleware handler
	return func(c fiber.Ctx) error {
		// Next request to skip middleware
		if cfg.Next != nil && cfg.Next(c) {
			return c.Next()
		}

		// Set headers
		if cfg.XSSProtection != "" {
			c.Set(fiber.HeaderXXSSProtection, cfg.XSSProtection)
		}

		if cfg.ContentTypeNosniff != "" {
			c.Set(fiber.HeaderXContentTypeOptions, cfg.ContentTypeNosniff)
		}

		if cfg.XFrameOptions != "" {
			c.Set(fiber.HeaderXFrameOptions, cfg.XFrameOptions)
		}

		if cfg.CrossOriginEmbedderPolicy != "" {
			c.Set("Cross-Origin-Embedder-Policy", cfg.CrossOriginEmbedderPolicy)
		}

		if cfg.CrossOriginOpenerPolicy != "" {
			c.Set("Cross-Origin-Opener-Policy", cfg.CrossOriginOpenerPolicy)
		}

		if cfg.CrossOriginResourcePolicy != "" {
			c.Set("Cross-Origin-Resource-Policy", cfg.CrossOriginResourcePolicy)
		}

		if cfg.OriginAgentCluster != "" {
			c.Set("Origin-Agent-Cluster", cfg.OriginAgentCluster)
		}

		if cfg.ReferrerPolicy != "" {
			c.Set("Referrer-Policy", cfg.ReferrerPolicy)
		}

		if cfg.XDNSPrefetchControl != "" {
			c.Set("X-DNS-Prefetch-Control", cfg.XDNSPrefetchControl)
		}

		if cfg.XDownloadOptions != "" {
			c.Set("X-Download-Options", cfg.XDownloadOptions)
		}

		if cfg.XPermittedCrossDomain != "" {
			c.Set("X-Permitted-Cross-Domain-Policies", cfg.XPermittedCrossDomain)
		}

		// Handle HSTS headers
		if c.Protocol() == "https" && cfg.HSTSMaxAge != 0 {
			subdomains := ""
			if !cfg.HSTSExcludeSubdomains {
				subdomains = "; includeSubDomains"
			}
			if cfg.HSTSPreloadEnabled {
				subdomains += "; preload"
			}
			c.Set(fiber.HeaderStrictTransportSecurity, fmt.Sprintf("max-age=%d%s", cfg.HSTSMaxAge, subdomains))
		}

		// Handle Content-Security-Policy headers
		if cfg.ContentSecurityPolicy != "" {
			if cfg.CSPReportOnly {
				c.Set(fiber.HeaderContentSecurityPolicyReportOnly, cfg.ContentSecurityPolicy)
			} else {
				c.Set(fiber.HeaderContentSecurityPolicy, cfg.ContentSecurityPolicy)
			}
		}

		// Handle Permissions-Policy headers
		if cfg.PermissionPolicy != "" {
			c.Set(fiber.HeaderPermissionsPolicy, cfg.PermissionPolicy)
		}

		return c.Next()
	}
}