HeapSort

const HeapSort: TSortingAlgorithm = (PtrListSorter_NoContextComparer: @ HeapSort_PtrList_NoContext; PtrListSorter_ContextComparer: @ HeapSort_PtrList_Context; ItemListSorter_ContextComparer: @ HeapSort_ItemList_Context; ItemListSorter_CustomItemExchanger_ContextComparer: @ HeapSort_ItemList_CustomItemExchanger_Context);