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: pki_enable_acme_issuance.go
    path of file: ./repos/vault/command/healthcheck
    
    the code of the file until where you have to start completion: // Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1

package healthcheck

import (
	"bytes"
	"context"
	"crypto/tls"
	"fmt"
	"net/http"
	"net/url"

	"github.com/hashicorp/go-secure-stdlib/parseutil"
	"github.com/hashicorp/vault/sdk/logical"
	"golang.org/x/crypto/acme"
)

type EnableAcmeIssuance struct {
	Enabled            bool
	Unsup
    
func (h *EnableAcmeIssuance) Evaluate(e *Executor) (results []*Result, err error) {
	if h.UnsupportedVersion {
		ret := Result{
			Status:   ResultInvalidVersion,
			Endpoint: h.AcmeConfigFetcher.Path,
			Message:  "This health check requires Vault 1.14+ but an earlier version of Vault Server was contacted, preventing this health check from running.",
		}
		return []*Result{&ret}, nil
	}

	if h.AcmeConfigFetcher.IsSecretPermissionsError() {
		msg := "Without this information, this health check is unable to function."
		return craftInsufficientPermissionResult(e, h.AcmeConfigFetcher.Path, msg), nil
	}

	acmeEnabled, err := isAcmeEnabled(h.AcmeConfigFetcher)
	if err != nil {
		return nil, err
	}

	if !acmeEnabled {
		if h.TotalIssuers == 0 {
			ret := Result{
				Status:   ResultNotApplicable,
				Endpoint: h.AcmeConfigFetcher.Path,
				Message:  "No issuers in mount, ACME is not required.",
			}
			return []*Result{&ret}, nil
		}

		if h.TotalIssuers == h.RootIssuers {
			ret := Result{
				Status:   ResultNotApplicable,
				Endpoint: h.AcmeConfigFetcher.Path,
				Message:  "Mount contains only root issuers, ACME is not required.",
			}
			return []*Result{&ret}, nil
		}

		ret := Result{
			Status:   ResultInformational,
			Endpoint: h.AcmeConfigFetcher.Path,
			Message:  "Consider enabling ACME support to support a self-rotating PKI infrastructure.",
		}
		return []*Result{&ret}, nil
	}

	if h.ClusterConfigFetcher.IsSecretPermissionsError() {
		msg := "Without this information, this health check is unable to function."
		return craftInsufficientPermissionResult(e, h.ClusterConfigFetcher.Path, msg), nil
	}

	localPathIssue := verifyLocalPathUrl(h)

	if localPathIssue != nil {
		ret := Result{
			Status:   ResultWarning,
			Endpoint: h.ClusterConfigFetcher.Path,
			Message:  "ACME enabled in config but not functional: " + localPathIssue.Error(),
		}
		return []*Result{&ret}, nil
	}

	ret := Result{
		Status:   ResultOK,
		Endpoint: h.ClusterConfigFetcher.Path,
		Message:  "ACME enabled and successfully connected to the ACME directory.",
	}
	return []*Result{&ret}, nil
}