fun <A, B, C> Arb.Companion.triple(arbA: Arb<A>, arbB: Arb<B>, arbC: Arb<C>): Arb<Triple<A, B, C>>
Returns a Arb where each value is a Triple generated by a value from each of three supplied generators.
Edgecases are provided as the cross product of the edge cases of the component arbs.