final void set(IN_NAME name, String... values) {
        final NAME normalizedName = normalizeName(name);
        requireNonNull(values, "values");

        final int h = hashName(normalizedName);
        final int i = index(h);

        removeAndNotify(h, i, normalizedName, true);
        for (String v : values) {
            requireNonNullElement(values, v);
            addAndNotify(h, i, normalizedName, v, false);
        }
    }
Only adds the specified {@code name} and {@code values}, and do not notify the changes via
{@link #onChange(CharSequence)}.
core/src/main/java/com/linecorp/armeria/common/StringMultimap.java