ByteVector put12(final int b, final int s) {
		int length = this.length;
		if (length + 3 > data.length) {
			enlarge(3);
		}
		byte[] data = this.data;
		data[length++] = (byte) b;
		data[length++] = (byte) (s >>> 8);
		data[length++] = (byte) s;
		this.length = length;
		return this;
	}