TemplateName type 
定义 TemplateName 的值。 
              KnownTemplateName 可与 TemplateName 互换使用,此枚举包含服务支持的已知值。
服务支持的已知值
              applicationApprovedNotificationMessage 
              accountClosedDeveloper 
              quotaLimitApproachingDeveloperNotificationMessage 
              newDeveloperNotificationMessage 
              emailChangeIdentityDefault 
              inviteUserNotificationMessage 
              newCommentNotificationMessage 
              confirmSignUpIdentityDefault 
              newIssueNotificationMessage 
              purchaseDeveloperNotificationMessage 
              passwordResetIdentityDefault 
              passwordResetByAdminNotificationMessage 
              rejectDeveloperNotificationMessage 
              requestDeveloperNotificationMessage
type TemplateName = string