This plugin is for organizing your steps. It allows you to collapse multiple steps when working on a complicated API or module with many steps.
On the designer canvas the Collapsible Region will appear as a set of brackets
You can then drag steps into the brackets or drag a bracket around other steps
Clicking minus sign - or double clicking a bracket will then collapse the section.
Clicking the dialog header enables you to enter a description for this region that will be visible when collapsed