iTop/application/applicationextension/backoffice/AbstractWelcomePopupExtension.php

<?php

/**
 * Inherit from this class to provide messages to be displayed in the "Welcome Popup"
 *
 * @api
 * @since 3.2.0
 */
abstract class AbstractWelcomePopupExtension implements iWelcomePopupExtension
{
    /**
     * @inheritDoc
     */
    public function GetIconRelPath(): string
    {
        return \Combodo\iTop\Application\Branding::$aLogoPaths[\Combodo\iTop\Application\Branding::ENUM_LOGO_TYPE_MAIN_LOGO_COMPACT]['default'];
    }

    /**
     * @inheritDoc
     */
    public function GetMessages(): array
    {
        return [];
    }

    /**
     * @inheritDoc
     */
    public function AcknowledgeMessage(string $sMessageId): void
    {
        // No need to process the acknowledgment notice by default
        return;
    }
}