code: @Contract(pure = true)
  	public static ByteBuf empty() {
  		assert EMPTY.head == 0;
  		assert EMPTY.tail == 0;
  		return EMPTY;
  	}
docs: Creates an empty {@code ByteBuf} with array of size 0,
  {@link #tail} and {@link #head} both equal to 0.
  
  @return an empty {@code ByteBuf}