    final void add(CharSequence name, Iterable<String> values) {
        final AsciiString normalizedName = normalizeName(name);
        requireNonNull(values, "values");
        final int h = normalizedName.hashCode();
        final int i = index(h);
        for (String v : values) {
            requireNonNullElement(values, v);
            add0(h, i, normalizedName, v);
        }
    }
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.