WordPress at a glance
функция не описана

IXR_IntrospectionServer::methodHelp() public WP 1.0

It's a method of the class: IXR_IntrospectionServer{}

Хуков нет.

Возвращает

Null. Ничего.

Использование

$IXR_IntrospectionServer = new IXR_IntrospectionServer();
$IXR_IntrospectionServer->methodHelp( $method );

Код IXR_IntrospectionServer::methodHelp() WP 5.5.1

<?php
function methodHelp($method)
{
    return $this->help[$method];
}