private OfflineGroup(int memberCount) {
this.members = new OfflineMember[memberCount];
// Obtain an average of the amount of elements to store for chunks
// Assume that each member adds 5 chunks every 10 carts
final int chunkCount = 25 + (int) ((double) (5 / 10) * (double) memberCount);
this.chunks = new LongHashSet(chunkCount);
this.loadedChunks = new LongHashSet(chunkCount);
}