我正在为客户端开发一个小插件，我的ajax调用返回整个页面json response. 我找不到窃听器。

在插件中main.php:

function __construct(){
  //..
  $this->PluginSetup();
}

function PluginSetup(){
  //..
  add_action( \'wp_ajax_the_sag_form\', array( $this , \'the_sag_form\' ) );
}

function the_sag_form(){
  $response = "hello";
  wp_send_json($response);
}

function init_inpage_functions(){
    var PageData = new FormData();
    PageData.append(\'action\', \'the_sag_form\');
    $.ajax({
        method: \'post\',
        url: ajaxurl,
        dataType: \'json\',
        data: PageData,
        processData: false,
        contentType: false,
        beforeSend:function(data){

        },
        success:function(data) {
            console.log(data);
        },
        error: function(data){

        }
    });

}