FacetFilter fully supports the SAPUI5 data binding concept.
As the information for the facet filter usually resides in the application backend, data binding is commonly used to populate the FacetFilter properties and aggregations.
Applications using OData do not bind the FacetFilterItem.selected property since this is not available from the backend service. Fortunately, selections are maintained internally on the client by the FacetFilterList until the list is destroyed.