A container is a type of data structure whose instances can store collections of values or instances. The values in a container must be of the same type. An element of a container can be retrieved later by using a label that the container associated with it.
The containers available in Blueprints are arrays, sets, and maps. To turn a variable into a container, click the icon next to Variable Type and choose one of the containers that appear, as shown in the next screenshot:
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