Which command is used to install a themelet into your Liferay theme?

The command used to install a themelet into your Liferay theme is "gulp extend." This command is specifically designed to extend the functionality of an existing theme by incorporating themelets, which are modular components that can provide additional styles, layouts, or features without needing to modify the core theme files directly. Using "gulp extend" allows developers to efficiently manage and build upon existing themes while maintaining clean and organized code.

The other commands serve different purposes: "gulp deploy" is used to deploy your theme to the Liferay server, "gulp build" compiles your theme assets, and "gulp init" initializes a new theme project. Each of these commands has its role in the theme development process but does not specifically pertain to installing themelets like "gulp extend" does. Understanding the distinction between these commands is key for effective theme development in Liferay.