HasItem.bindItems(Signal<List<Signal<T>>> items);

[Legioth]

Should support fine-grained updates so that a change to the outer signal triggers refreshAll() whereas a change to any of the inner signals triggers refresh(item).

Should verify that it works as expected with the three main lazy loading components, Grid, ComboBox and LazyList, and at least one eagerly loaded component such as RadioButtonGroup

[mshabarov]

Few thoughts about implementation:
HasItems can create a new in-memory DataProvider and use its refresh methods from the effects.
On the other hand we have HasListDataView that returns the data view, that gives an access to items and it's newer concept.
HasItems is a base for HasDataProvider and HasItemComponents (that depends on the data provider in the components) and perhaps not the best place.

So I'd put the bindItems to the HasListDataView and delegate to existing setItems(ListDataProvider<T> dataProvider) method there with addition that it will create effects for the whole list changes and granular items changes.