Test panel follows the page object model, where the page (panel) contains the element locators and actions associated with a page.
It is called Panel, because it's applicable to more than just web pages, including mobile app panels, and sections of pages (eg. side bar). Hence, the name Panel is a more comprehensive.
Panel compromises of 2 parts: Locator, and Action
On compile, panel manager is generated using Java annotations
The panel manager takes care of linking the panels, so they can interact with one another