export function defmulti<A, B, C, D, E, F, G, H, T>(
    f: DispatchFn8<A, B, C, D, E, F, G, H>,
    rels?: AncestorDefs,
    impls?: IObjectOf<Implementation8<A, B, C, D, E, F, G, H, T>>
): MultiFn8<A, B, C, D, E, F, G, H, T>;