WordPress at a glance
function is not described

IXR_Server::hasMethod() public WP 1.0

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

No Hooks.

Return

Null. Nothing.

Usage

$IXR_Server = new IXR_Server();
$IXR_Server->hasMethod( $method );

Code of IXR_Server::hasMethod() WP 5.5.1

<?php
function hasMethod($method)
{
    return in_array($method, array_keys($this->callbacks));
}