    void iteratorSetShouldFail() {
        final HttpHeadersBase headers = newEmptyHeaders();
        headers.add("name1", "value1", "value2", "value3");
        headers.add("name2", "value4");
        assertThat(headers.size()).isEqualTo(4);

        assertThatThrownBy(() -> headers.iterator().next().setValue(""))
                .isInstanceOf(UnsupportedOperationException.class);
    }
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.