    void testHeaderNameNormalization() {
        final HttpHeadersBase headers = newHttp2Headers();
        headers.add("Foo", "bar");
        assertThat(headers.getAll("foo")).containsExactly("bar");
        assertThat(headers.getAll("fOO")).containsExactly("bar");
        assertThat(headers.names()).contains(HttpHeaderNames.of("foo"))
                                   .doesNotContain(AsciiString.of("Foo"));
    }
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.