@Override
    public boolean contains(CharSequence name, CharSequence value) {
        return contains(name, value, false);
    }
@Test
    public void testContainsName() {
        Http2Headers headers = new DefaultHttp2Headers();
        headers.add(CONTENT_LENGTH, "36");
        assertFalse(headers.contains("Content-Length"));
        assertTrue(headers.contains("content-length"));
        assertTrue(headers.contains(CONTENT_LENGTH));
        headers.remove(CONTENT_LENGTH);
        assertFalse(headers.contains("Content-Length"));
        assertFalse(headers.contains("content-length"));
        assertFalse(headers.contains(CONTENT_LENGTH));

        assertFalse(headers.contains("non-existent-name"));
        assertFalse(headers.contains(new AsciiString("non-existent-name")));
    }