HeaderValues9
typealias HeaderValues9<H1, H2, H3, H4, H5, H6, H7, H8, H9> = Tuple9<HeaderValues<*>, HeaderValues<H1>, HeaderValues<H2>, HeaderValues<H3>, HeaderValues<H4>, HeaderValues<H5>, HeaderValues<H6>, HeaderValues<H7>, HeaderValues<H8>, HeaderValues<H9>>(source)
Tuple of fixed header values with nine entries.