@Override
    public T addByte(K name, byte value) {
        throw new UnsupportedOperationException("read only");
    }
@Test
    public void testAddByte() {
        assertThrows(UnsupportedOperationException.class, new Executable() {
            @Override
            public void execute() {
                HEADERS.addByte("name", (byte) 1);
            }
        });
    }