    void testGetOperations() {
        final HttpHeadersBase headers = newEmptyHeaders();
        headers.add("Foo", "1");
        headers.add("Foo", "2");

        assertThat(headers.get("Foo")).isEqualTo("1");

        final List<String> values = headers.getAll("Foo");
        assertThat(values).containsExactly("1", "2");
    }
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.