litho-widget-kotlin/com.facebook.litho.widget.collection/CollectionGroupSectionSpec/onViewportChanged

onViewportChanged

@JvmStatic
fun onViewportChanged(    c: SectionContext,     firstVisibleIndex: Int,     lastVisibleIndex: Int,     totalCount: Int,     firstFullyVisibleIndex: Int,     lastFullyVisibleIndex: Int,     onViewportChanged: OnViewportChanged?)