    public void testOfCharSequence() {
        // Should produce a lower-cased AsciiString.
        assertThat((Object) HttpHeaderNames.of("Foo")).isEqualTo(AsciiString.of("foo"));

        // Should reuse known header name instances.
        assertThat((Object) HttpHeaderNames.of("date")).isSameAs(HttpHeaderNames.DATE);
    }
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.