type LifetimeValidator
cangjie
public type LifetimeValidator = (expires: ?DateTime, notBefore: ?DateTime, securityToken: SecurityToken,
validationParameters: TokenValidationParameters) -> Bool功能：表示生命周期验证委托。
目标类型：(expires: ?DateTime, notBefore: ?DateTime, securityToken: SecurityToken, validationParameters: TokenValidationParameters) -> Bool