try {
pendingTickListEntriesHashSet = null;
} catch (NoSuchFieldError ignored) {
//MCPC+ compatibility - they also remove this.
}
pendingTickListEntries = new TreeHashSet();
try {
chunkTickSet = (HashSet<ChunkCoordIntPair>) activeChunkSet;
} catch (NoSuchFieldError ignored) {
//Spigot support
chunkTickSet = new HashSet<ChunkCoordIntPair>();