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: data_source_google_storage_transfer_project_service_account.go
    path of file: ./repos/magic-modules/mmv1/third_party/terraform/services/storagetransfer
    
    the code of the file until where you have to start completion: package storagetransfer

import (
	"fmt"

	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
	"github.com/hashicorp/terraform-provider-google/google/tpgresource"
	transport_tpg "github.com/hashicorp/terraform-provider-google/google/transport"
)

func DataSourceGoogleStorageTransferProjectServiceAccount() *schema.Resource {
	return &schema.Resource{
		Read: dataSourceGoogleStorageTransferProjectServiceAccountRead,
		Schema: map[string]*schema.Schema{
			"email": {
				Type:     schema.TypeString,
				Computed: true,
			},
			"project": {
				Type:     schema.TypeString,
				Optional: true,
				Computed: true,
			},
			"subject_id": {
				Type:     schema.TypeString,
				Computed: true,
		
    
func dataSourceGoogleStorageTransferProjectServiceAccountRead(d *schema.ResourceData, meta interface{}) error {
	config := meta.(*transport_tpg.Config)
	userAgent, err := tpgresource.GenerateUserAgentString(d, config.UserAgent)
	if err != nil {
		return err
	}

	project, err := tpgresource.GetProject(d, config)
	if err != nil {
		return err
	}

	serviceAccount, err := config.NewStorageTransferClient(userAgent).GoogleServiceAccounts.Get(project).Do()
	if err != nil {
		return transport_tpg.HandleDataSourceNotFoundError(err, d, "Google Cloud Storage Transfer service account not found", fmt.Sprintf("Project %q Google Cloud Storage Transfer account", project))
	}

	d.SetId(serviceAccount.AccountEmail)
	if err := d.Set("email", serviceAccount.AccountEmail); err != nil {
		return fmt.Errorf("Error setting email: %s", err)
	}
	if err := d.Set("subject_id", serviceAccount.SubjectId); err != nil {
		return fmt.Errorf("Error setting subject_id: %s", err)
	}
	if err := d.Set("project", project); err != nil {
		return fmt.Errorf("Error setting project: %s", err)
	}
	if err := d.Set("member", "serviceAccount:"+serviceAccount.AccountEmail); err != nil {
		return fmt.Errorf("Error setting member: %s", err)
	}
	return nil
}