Anyone available to explain what AbstractRepeater does? I’m reviewing au-grid and it appears its utilizing it as a virtual repeater, but I’m not really grasping the benefit, if any, implementing AbstractRepeater within a custom element provides.

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You don’t have to extend AbstractRepeater, but it does give you better runtime error when you missed to implement some methods.

It is supposed to be used as the type for the following locations (few examples, not complete list), but the code was never cleaned up when migrating from js to ts.