<p>It is its own module, and a tiny one, because the callers that need it sit on both sides of a boundary neither should have to cross. {@code PrivateHosts} lived in the format SPI, so the webhook, forwarding and emulator legs in {@code settings} could not reach it without dragging that SPI - eighty-nine test modules of reach - along for a range table. The alternative they took instead was a second private copy of the same ranges, and that is not a stylistic duplication: the inline copy that ...