class MailGeneralConfigServiceImpl extends AbstractGeneralConfigServiceImpl<EmailNoticeSender> {

    /**
     * MailGeneralConfigServiceImpl的构造函数，通过默认构造函数或者反序列化构造(setBeanProps)来创建该类实例。
     * 参数generalConfigDao用于操作数据的dao层，参数objectMapper用于进行对象映射。
     * MailGeneralConfigServiceImpl's constructor creates an instance of this class
     * through the default constructor or deserialization construction (setBeanProps).
     * The parameter generalConfigDao is used for dao layer operation data,
     * and objectMapper is used for object mapping.
     * @param generalConfigDao 数据操作的dao层，供创建该类实例所需
     *                         dao layer operation data, needed to create an instance of this class
     * @param objectMapper     对象映射，供创建该类实例所需
     *                         object mapping , needed to create an instance of this class
     */
    public MailGeneralConfigServiceImpl(GeneralConfigDao generalConfigDao, ObjectMapper objectMapper) {
        super(generalConfigDao, objectMapper);
    }
    
    @Override
    public String type() {
        return "email";
    }
    
    /**
     * 该方法用于获取NoticeSender类型的TypeReference，以供后续处理。
     * This method is used to get the TypeReference of NoticeSender type for subsequent processing.
     * @return NoticeSender类型的TypeReference
     * a TypeReference of NoticeSender type
     */
    @Override
    protected TypeReference<EmailNoticeSender> getTypeReference() {<FILL_FUNCTION_BODY>}
}

        return new TypeReference<>() {
            @Override
            public Type getType() {
                return EmailNoticeSender.class;
            }
        };
    
<methods>public org.apache.hertzbeat.manager.pojo.dto.EmailNoticeSender getConfig() ,public void saveConfig(org.apache.hertzbeat.manager.pojo.dto.EmailNoticeSender) <variables>protected final non-sealed org.apache.hertzbeat.manager.dao.GeneralConfigDao generalConfigDao,protected final non-sealed ObjectMapper objectMapper