@Override
public void rotateLeft(IBuilderContext context) {
NBTTagList nbttaglist = cpt.getTagList("Pos", 6);
Position pos = new Position(nbttaglist.func_150309_d(0),
nbttaglist.func_150309_d(1), nbttaglist.func_150309_d(2));
pos = context.rotatePositionLeft(pos);
cpt.setTag("Pos",
this.newDoubleNBTList(pos.x, pos.y, pos.z));
nbttaglist = cpt.getTagList("Rotation", 5);