xmpp::DoInstall: Bitrix method

      
<?php 
//  xmpp :: DoInstall()
//  /dist/bitrix/modules/xmpp/install/index.php:91

    
function DoInstall()
    {
        global 
$DOCUMENT_ROOT$APPLICATION;

        if (
IsModuleInstalled("xmpp"))
            return 
false;
        if (!
check_bitrix_sessid())
            return 
false;

        
$this->InstallDB();
        
$this->InstallEvents();
        
$this->InstallFiles();

        
$APPLICATION->IncludeAdminFile(GetMessage("XMPP_INSTALL_TITLE"), $DOCUMENT_ROOT."/bitrix/modules/xmpp/install/step.php");
    }