question: public static ChunkStorage load ( World world , ChunkDataBase chunkData , NBTTagCompound nbt , boolean packet ) { try { ResourceLocation type = new ResourceLocation ( nbt . getString ( "type" ) ) ; Class < ? extends ChunkStorage > storageClass = ChunkStorage . getStorageType ( type ) ; if ( storageClass == null ) throw new Exception ( "Chunk storage type not mapped" ) ; Constructor < ? extends ChunkStorage > ctor = storageClass . getConstructor ( World . class , ChunkDataBase . class ) ; ChunkStorage storage = ctor . newInstance ( world , chunkData ) ; if ( packet ) { storage . readFromPacketNBT ( nbt . getCompoundTag ( "storage" ) ) ; } else { storage . readFromNBT ( nbt . getCompoundTag ( "storage" ) ) ; } return storage ; } catch ( Exception ex ) { throw new RuntimeException ( ex ) ; } }
target:  Loads a chunk storage from NBT