// Creating a spacer of 20 pixels JToolBarHelper::spacer(20); // Creating two spacers of 10 pixels each JToolBarHelper::spacer(10); JToolBarHelper::spacer(10);These code snippets create blank spaces of different lengths (20 and 10 pixels, respectively) in the Joomla! toolbar. JToolbarHelper spacer is part of the Joomla! Framework package library, which is a collection of classes, functions, and tools that facilitate the development of Joomla! extensions and applications. This package library contains various methods for creating and customizing Joomla! toolbars, including spacers, buttons, separators, and other UI elements.