JHtml::addIncludePath(JPATH_SITE . '/libraries/mylibrary');
JHtml::addIncludePath(JPATH_SITE . '/modules/mod_mymodule');In this example, we are adding a custom module called "mod_mymodule" that is located within the "modules" folder of Joomla's site directory. Package Library: JHtml is a part of the Joomla framework, and addIncludePath function is specific to the Joomla platform. Therefore, the package library for this would be Joomla framework.