    public void iterateEmptyHeadersShouldThrow() {
        final Iterator<Map.Entry<AsciiString, String>> iterator = newEmptyHeaders().iterator();
        assertThat(iterator.hasNext()).isFalse();
        iterator.next();
    }
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.