Why is there no init function with `configureCellBlock` in `RxASCollectionAnimatedDataSource` https://github.com/RxSwiftCommunity/RxASDataSources/blob/9aa99c168d54107a8677244d5abac0a57e77ea71/Sources/DataSources/ASCollectionNode+Rx/RxASCollectionAnimatedDataSource.swift#L32